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TELOS PROSTREAM USER'S MANUAL

1. Input Output AG Final Limit Final Limit i 4 i q a WE L MH LR F 0 i i 45 Output 30 30 20 EJ MIX Final Limiter Limiter The final limiter is a fast look ahead peak limiter that provides final peak control to the processed audio Limiter Generally set the Limiter level control until you see about 2 to 4dB of gain reduction on the Final Limit meters with normal program audio playing Too low of a setting will decrease loudness while too high of a setting can sound too dense and over processed 60 Section 5 Output Input Output AGC Final Limit Input Eg WE LMH LR WE Final AGC Limit Out put Gain Left Gain Right I l Output Filter Gain Left amp Right The Gain Left and Gain Right controls set the final peak output level that feeds the codec Normally this can be set to just under the maximum setting of 6 0dB This setting corresponds to about OdBFS Normally a setting of 5 8dB should be fine but be sure to listen for clipping distortion through the codec and adjust as needed Output Filter Dynamics processing is an extremely useful tool for reducing audible artifacts from lossy compression codecs High frequencies tend to be the first perceptible annoyances followed by that swishy swirly water like sound common at lower bitrates These artifacts can be reduced and in some cases eliminated when audio processing is applied as a tool Generally as codec bi
2. o 2 ee ana A 13 Pont anel a nope een ee See REE EG Oe Bee 13 Pack MA e 24 oe 6606 Phas ee eee eee ee hae nee 14 Status Display 2 ee 14 INOW gt order chee we ee be ee 15 Automatic Gain Control AGC 2 ee ee 15 CU ee ee eo a a ee 15 Editing Text ceras a ee Se a a AA 16 ext entry mode 454444 bee Goes wee oo we een 16 erase mode nn 16 TELOS PROSTREAM Web Configuration lt lt lt lt 17 Default Credentials cocer ee 2m 0 a an 17 ProSTREAM Configuration 19 Audio MOL 2 0 ot owe be a ee ra 19 Audio 1 0 interface cease ct 2a we Es zen ans ae 19 XLR analog as py oa ra a De 19 Input audio gain 2 2 Co o o ee ee ee 19 Output audio gain 2 22 2 oo ee ee ee eee 19 LVN ae eek be eee ee eee ee 20 Input Livewire channel destination 20 Output Livewire channel source 2 2 2222 20 Network Menu aras rr ar pana Re eS 21 ANIMA ascensos cra aa ore nana 22 MOG 56 ne ae e e a ar 2 Auto DHCP 0 0 022 does ae ee ed Se 22 MANUAL 2 ieee tne hen bt Gee eee eae 22 DISABLED sca aia a obs oe e Ee aA 22 PROCS 646 t 0 ave tara ae a 22 Auto DHCP ea sueo re aos ad eo 22 MANUAL 2 son esassas se Sa eek sas 22 Neu Se a hee ee ed ee hoe ea eee ee eae a 22 AUTO DHCP se 6 o o 6650 6 5 Bern oe a 22 MANUAL 2 a one A eh ae 22 GEN vo bh hee hae ee ee eee eee ee ee 2 Alto DHCP cu wae a a ae an naar dae 2 MANUAL GWE hoe
3. Specifying a gateway is optional If the WAN port is in use for connection to the Internet set the LAN gateway to 0 0 0 0 If the WAN port is disabled specify the IP address of the network gateway router PROSTREAM CONFIGURATION 23 WAN Interface Mode Auto DHCP IP address is provided by a DHCP elsewhere on the network This is the default configuration when connecting to a network routed by a typical consumer brand gateway router device for Internet access MANUAL A standard IPV4 IP address must be specified DISABLED Disable the WAN port IP Address Auto DHCP The IP Address field will show current IP address or 0 0 0 0 if no address is assigned MANUAL A valid IPV4 IP address must be specified Netmask Auto DHCP The Nemask field will show the value assigned by the DHCP server MANUAL A valid IPV4 netmask must be specified Gateway Auto DHCP The Gateway field will show the value assigned by the DHCP server MANUAL Specifying a gateway is optional Ifthe WAN port is in use for connection to the Internet specify the IP address of the network gateway router DNS Servers DNS server entry is not required but recommended DNS is what allows a named address google com to refer to a numerical address 74 125 255 134 Iflocal DNS servers are unknown or unavailable Google s public DNS server can be used with the IP addresses 8 8 8 8 amp 8 8 4 4 24 Section 4 Codec 1 2 Codec AAC L
4. edit to bring up the Preset Editor none Music 24kbps Music 32kbps g Normalize PhatOne Smooth Sparkle Squashedl Talk Talk 24kbps Talk 32kbp 54 Section 5 Preset Editor Using the Preset Editor it is possible to customize the chosen preset to suit your own aural requirements Note Be sure to click Save in the upper right hand corner of the editor window when you are finished to save your changes If you do not they will be lost when you exit the editor Editing preset PhatOne used by ProStream Output AG Final Limit A Lar i Input EE WB LR E i I s F WE Final E a E e E Limit 18 18 E 10 an 4 14 15 15 15 Output 30 30 20 20 20 36 36 2 25 15 Input Gain Left Gain Right I l Processor Adjustment Overview 1 Start with a factory preset and adjust processor values in small increments 2 Listen to the post processed audio ideally through the codec to be used then adjust and listen again Aural evaluation should occur over time not in short moments 3 While making changes to the system adjust in small increments Do not make too many different adjust ments all at once Multiple adjustments at once can make for more difficult determination of what affected an aural change Make changes in increments of no more than 0 5 dB or 1 dB or in 1 or 2 step increments Turn functions on and off to better determine their effect on the audio 4 Sle
5. url url n The LogInfo function is used to write data to the ProSTREAM logs This function when used in combination with a syslog server application will allow real time analysis of the script during the customization or debug phase of the script creation 32 Section 4 10 06 56 208 Core Info Url URL encoded 10 06 56 208 Core Info Reply from ICEcast server at chico 8000 lofi HTTP 1 0 200 OK Metadata update successfull 10 08 38 937 Metadata Info MetaData SendMetaDataSong No code page conversion needed UTE B UTE A 10 08 38 951 Core Info meta song title Thievery Corporation Sol tapado url 10 08 38 952 Core Info Send metadata to SHOUTcast v2 server at 192 168 2 200 1 Aes 2S BEF Para Trfrne Title Pf YMT ar nm aaaA ITh iarar r Parmanarartinm Fel tanadnt All data inside the double quotes of the LogInfo container LineParser Script title title url url n appears in the system log output The variables from earlier in the script are specified by name to deliver their contents to the output The n specifies a newline character to represent the end of our submission to the log SendMetaDataSong title url The SendMetaDataSong function sends the title and url information to the stream server which will then pass it along to the clients Although the word Song appears in the function name for historical reason
6. Ge bs bo arrastre 22 WAN Interface 2 ao hacia ae Aa aa a Ane 23 NOW 5565 one eee ee eee Cee eee ee oo 23 MIO DACP ae oe owe ee el 23 MANUAL o s Gb oo oo 6 oe uten 23 DISABLED asomado pe A ee ee me BG e A 23 Iv Table of Contents IP Address ss dre de rara E del a eo RE 23 AUTO DHCP oa nenne anne ee 23 AN eras ea ena a a as 23 o A IE 23 Auto DHCP amar a BG A oe a eek me 23 MANUAL oo he Soe ee Ge ee eee 23 CUM Sa ars ee eee a aa 23 A 23 MANUAL ono 2 amp 2 Oe ee oh ele ee erg 23 UNS SINE wae oe oe Ge eek Cee ee ee ees 23 Coa o pdas erro ra ases nas 24 Compression Codec ooo aa 25 MP3 The standard for digital audio 2 2 2 222020 25 AAC LC Low Complexity 25 HE AAC High Efficiency 25 MAMAS gt uncasesoosrosss ares eS ee 25 Dl a ra E ARA 26 Transport AAC AI 26 Pa noe eons Oe Rae ee eA eh ee 26 ADS Gen os oe Bra ee os HOSS 26 Mika ee ae ee ass sn ene ee e 26 RAW amp Be cae he ade hikes ve eee ase ar 26 Meladdl bo 2 Seto eed oe tee abe woe ean eee tees 27 MDM 6 bee Bas Se eee ee eee he ee ee ae 28 PROCESS ra a ee ee 29 Custom Metadata Scripts 31 Lua Script Example 2 4 5 400 ee ea Sea eee een 31 Code Breakdown 4 0 4 Gee ea weed bdo oe des 31 Metadata Tools 222222 ee ee 32 Metadata Pack asadores od 6 eee ae ehe 32 MetadataCapture exe 2222 2 o 33 MetadataSend exe o
7. RAW Raw mode will release the AAC data stream without any transport container at all and consists of nothing more than the encoded audio data PROSTREAM CONFIGURATION 27 Metadata een ProSTREAM Metadata TT Ea ProStream accepts metadata on port 9000 both TCP and UDP It parses the data re filters small scripts using the Lua programming language see http www lua org for more infor Select a metadata filter below then click the Save button You can also click here to manage your metadata filters or upload new ones Select metadata filter XML WideOrbit Input code page encoding Output code page encoding Save Metadata or data about the data can be combined with the audio stream for delivery to end clients The metadata includes textual information about the current content of the audio stream such as track title and artist current program titles or branding and can also include a URL to associate with the stream Most end clients which are used to play the streaming audio contain displays which can be used to present the text information in real time In the event that no metadata is provided to ProSTREAM the stream s Stream Name configuration will be included as the stream s text content Data sent to the ProSTREAM is parsed internally by filters which are short scripts using the Lua programming language see http www lua org Lua scripts can be modified and uploaded to
8. Reply from ICEcast server at 192 168 2200 Core Info Send metadata to SHOUTcast v2 server at Core Info Title XML encoded e 1977 original Broz CoreInfo Url AML encoded http TelosAlliance Core Info ShoutcastV2 UpdateMetadata CodePagel Core Info Send metadata to ICEcast server at chico Core Info Title URL encoded e 20 628197 7962001 35 Copy edo pts Messages Inf 9129 Cri 399 Err 472 Server status running on UDP port 514 http axiaaudio com open source software axia syslog server download Syslog Server is a free syslog server application to display incoming system logs in real time If desired logs can also be saved to file Seeing the log at the exact moment of submitting a test batch of data can be extremely helpful and is recommended process for script creation The download will also contain a brief PDF file explaining application use 36 Section 4 File to TCP This application watches a directory for file changes and sends the changed file contents to a TCP IP port Watch for changes Directory File mask Send to TCP IP Destination address 192 168 2 10979000 Status Fill in the fields above then dick the Start button to begin http omniaaudio com software metatools download Some automation playback systems are only capable of writing metadata output to a file The File to TCP applica tion when running will watch for a file or folder to change and when the chan
9. in the ProStream MP3 AAC codec settings and RAW or ADIF transport format when AAC codec is selected ProS HREAN Select the desired system options below 8 Copyright 8 2013 TLS Corporation The system page can be accessed to either switch the firmware bank of the ProSTREAM or to reboot the unit The System Web interface will also allow the upload of new software images Note Itis good practice to schedule periodic maintenance of the ProSTREAM encoder and check for updated software New software can be found at http telos systems com prostream PROSTREAM CONFIGURATION 45 Firmware is delivered via a single compressed tgz file From the system page of the web interface the Update Software button will bring up a file browser where the new firmware image file can be updated to the software bank Once uploaded ProSTREAM can be rebooted to the new software bank All existing configuration options will remain intact Advanced Options Logs Date Time Update date time SysLog server w 192 168 2 209 6 8 Date Time If required it is possible to reset the ProSTREAM system time from the Logs menu Logs To help troubleshooting problems ProStream allows to view last 500 system log messages when the web interface control panel is used If a problem occurs cannot connect to the streaming server etc log messages should be reviewed before any ProStream reboots because the log messages are deleted when the
10. kbps 128 AAC Low Complexity Good for 3G networks Y AAC Format AAC LC AAC Channels Stereo AAC Bitrate 24 320 kbps 96 AAC Transport ADTS High Efficiency V2 Good for Edge 2G networks and lower bit rates Sample Rate 44100 Hz AAC Format HE AAC v2 AAC Channels Stereo AAC Bitrate 14 56 kbps 48 AAC Transport ADTS 4 Section 1 Once the Codec encoders are configured it should be possible to monitor the encoded audio streams via a connect ed network audio player Each codec can be monitored separately via the ProSTREAM s internal Stream Server In the table below ip address represents the IP address assigned to the ProSTREAM Test Stream Connection URL s Codec 1 Codec 2 PLS http ip address play pls PLS http ip address play2 pls M3U http ip address play m3u M3U http ip address play2 m3u ASX http ip address play asx ASX http ip address play2 asx RAW http ip address 8000 RAW http ip address 8010 Note The ProSTREAM s playlist links are for testing only and should NEVER be deployed as public connection points Always use a streaming server Stream Configuration Stream configurations are provided by the stream relay provider or set in the stream server configuration files ProSTREAM has four 4 configurable stream uplinks which can be set to push audio from either ofthetwo 2 available encoded codecs SHOUTcast DNAS v2 0 Example The free SHOUTcast DNA
11. network configurations No user functions are included Interface configuration Link information IP rules PROSTREAM CONFIGURATION 49 IP routing 50 Section 4 View memory usage diagnostics The memory usage page is based on the standard Linux tool top This presents a list of all processes in the CPU and can be very helpful in debugging rogue processes No user functions are included PROSTREAM CONFIGURATION 51 View system diagnostics System diagnostics presents the output of the Linux dmesg This can be helpful in diagnosing startup or other system level issues No user functions are included 52 Section 4 View front panel image Refresh page to capture current front panel image Right click the image lnk below to save it to your PC AGC LIMIT ee Teie 30 20 E screen Image Link View front panel image will present the same image as what is currently displayed on the unit front panel A direct link is included on this page No user functions are included Display public IP works only if DNS is configured Display public IP will return a simple HTML page with nothing more than the public IP address of the routed IP network Since this tools refrerences against http whatismyip akamai com failure of this command can be an indicator of an improperly or un configured DNS entry under the ProSTREAM s Network Settings If in doubt Google s public DNS servers can be used 8 8 8 8 an
12. password gt lt admin user gt admin lt admin user gt lt admin password gt adminpwd lt admin password gt lt authentication gt lt listen socket gt lt port gt 8000 lt port gt lt listen socket gt ICEcast per stream configuration is un needed Streams are distinguished by the mount point configuration which is specified in the source device ProSTREAM Stream 3 N e gt 9 gt gt gt 9 Stream 3 Stream Type ICEcast Codec Codec 1 Server Address CEcast ip port example 192 168 2 200 8000 Mount Point hifi can be any URL compatible string Server Username source can be overridden in icecast xml config Server Password lt source password gt example streampwd Metadata Username lt admin user gt example admin Metadata Password lt admin password gt example adminpwd Stream Name ProSTREAM HiFi sent to clients Stream Genre ivewire Stream URL URL of Station Website sent to clients example http TelosAlliance com Server version version 2 Stream Availability public 8 Section 1 Stream 4 y e a gt gt gt Stream 4 Stream Type ICEcast Codec Codec 2 Server Address ICEcast ip port example 192 168 2 200 8000 Mount Point lofi can be any URL compatible string Server Username source can be overridden in icecast xml config Server Password lt source password gt example streampwd Meta
13. the failure to use telephone and power line surge protection devices accident neglect or damage EXCEPT FOR THE ABOVE STATED WARRANTY TELOS SYSTEMS MAKES NO WARRANTIES EXPRESS OR IMPLIED INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE In no event will Telos Systems its employees agents or authorized dealers be liable for incidental or consequential damages or for loss damage or expense directly or indirectly arising from the use of any Product or the inability to use any Product either separately or in combination with other equipment or materials or from any other cause In order to invoke this Warranty notice of a warranty claim must be received by Telos Systems within the above stated warranty period and warranty coverage must be authorized by Telos Systems If Telos Systems authorizes the performance of warranty service the defective Product must be delivered shipping prepaid to Telos Systems 1241 Superior Avenue East Cleveland Ohio 44114 Telos Systems at its option will either repair or replace the Product and such action shall be the full extent of Telos Systems obligation under this Warranty After the Product is repaired or replaced Telos Systems will return it to the party that sent the Product and Telos Systems will pay for the cost of shipping Telos Systems authorized dealers are not authorized to assume for Telos Systems any additional obligations or liabilities in connec
14. to live TTL e g 15 Stream name ProSTREAM RTP RTP interface Force payload type to MPA for Luci Live compatibility Save 42 Section 4 Target Server Set the target server to RTP Audio Codec Specify which of the two codec encodes to use for the RTP stream Target server RTP 7 96 kbps Stereo DO Hz 46 kbps Stereo Audio codec RTP destination address KTP destination port Time to live TTL e g 15 nn RTP interface Force payload type to MPA for Luci Live compatibility eg 517 Note RTP allows uncompressed delivery as well Select a PCM codec to be able to specify the Samples per RTP packet RTP destination address Enter the destination UDP address to which RTP packets will be sent Address can be unicast or multicast RTP destination port Enter the UDP port to which RTP packets will be sent Time to live TTL Defines how far from a sending host a given UDP packet should be forwarded For example use value 1 to limit UDP streams to local network subnet only Stream name The name entered here will be sent in the SDP discovery broadcast messages This title is typically displayed on the end user s player or device when stream is discovered and played RTP interface If more than one network interface for ProStream is configured RTP interface selection allows to define to which network interface RTP stream will be sent Usually interface needs to be set
15. unit reboots 46 Section 4 If more than 500 log message lines must be reviewed it is possible to set up a SysLog compatible server on another computer and forward log messages to this server by entering its IP address in the ProStream logs section This allows all new log messages to be sent to the remote SysLog server to assist with system setup and diagnosis Syslog Server Assign the IP address of a computer running a syslog server All logs written to the ProSTREAM syslogs will also be written at the same time to the syslog server assigned A syslog server will present logs as they are generated which can assist with setup and diagnosis Metadata setup especially benefits from use of the real time syslog server Ping Service ProSTREAM ProSTREAM can monitor up to four hosts using ping Enter the IP address es and ping parameters below Click the save button when done Host IP 1 192 168 2200 Host IP 2 192 168 1 200 no response Host IP 3 Host IP 4 Pp l Ping interval seconds Alarm after seconds The ping service provides a means to test connectivity to certain IP addresses from the ProSTREAM This can be useful in diagnosing connection issues from the ProSTREAM to remote servers Ping results will display both in the Web interface and in syslog as pinger events pinger Warning Host 192 168 1 200 failed to respond to pings after 15 sec Host IP Specify up to four 4 separate IP addresses to
16. 8 listeners 0 unique Listener Peak 0 Stream Name Name of Stream Content Type audio aac Stream Genre livewire Stream URL http TelosAlliance com The Listen link now provides a stream listen URL for client deployment 6 Section 1 Stream 2 A Stream 2 Stream Type SHOUT cast Codec Codec 2 Server Address SHOUTcast ip portbase example 192 168 2 200 8010 Server Password password example streampwd Stream Name Name of Stream sent to clients Stream Genre Genre of Stream SHOUTcast guidelines Stream URL URL of Station Website sent to clients example http TelosAlliance com Server version version 2 Stream ID 2 e gt A A 181 Stream Availability public x ul A http 192 168 2 200 2010 index html Or Ei 2 SHOUTcast DNAS Summary X fr amp SHOUTcast DNAS Summary SHOUTcast Server v2 0 0 29 posix linux x6 Administrator Login Stream 1 Admin Login Stream 2 Admin Login Two streams are now avalable from the SHOUTcast DNAS server QUICKSTART 7 ICEcast Example Icecast is a free stream relay software available from http www icecast org ICEcast Config file ICEcast must be launched with a configuration file specification typically icecast xml The following parameters are required from the ICEcast configuration file lt authentication gt lt source password gt streampwd lt source password gt lt relay password gt relaypwd lt relay
17. 93 and as the first digital compression technique to find widespread acceptance is in most all digital stream clients that exist AAC benefited greatly from being the second go at audio compression as it was able to be designed with all that was learned with MP3 AAC also boasts multiple profiles to fit the need of the transmission MP3 The standard for digital audio MP3 is an all encompassing audio compression codec MP3 is the safest choice for decoding compatibility but creates the least clear audio of all codecs available AAC LC Low Complexity Gp AAC LC Formerly known as aacPlus or AAC Advanced Audio Coding s Low Complexity codec is a high performance codec for excellent audio quality at standard bitrates AAC LC can be found in widespread use most notably in Apple s iTunes When compared side by side with MP3 the superior quality of audio encoded with AAC LC becomes much more apparent at lower bitrates HE AAC High Efficiency 9 HE AAC High Efficiency Advanced Audio Coding is a newer AAC codec and incorporates Spectral Band Replication SBR bandwidth expansion to improve audio at very low bitrates HE AAC v2 applies a Parametric Stereo feature to HE AAC codec allowing for even further reduction in bandwidth Channels Choose from mono or stereo encoding 26 Section 4 Bitrate The full spectrum of ProSTREAM encoding can be anywhere from 14 320 kbps for the output data stream bit
18. AC wall outlets extension cords or integral convenience outlets as this can result in a fire or electric shock hazard Object and Liquid Entry Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock Never spill liquid of any kind on the product Accessories Do not place this product on an unstable cart stand tripod bracket or table Any mounting of the product needs to follow the manufacturer s instructions 15 16 17 18 19 Servicing Refer all servicing to qualified service personnel Damage Requiring Service Unplug this product from the wall AC outlet and refer servicing to qualified service personnel under the following conditions When the AC cord or plug is damaged If liquid has been spilled or objects have fallen into the product If the product does not operate normally following operating instructions Ifthe product has been exposed to rain or water If the product has been dropped or damaged in any way When the product exhibits a distinct change in performance outside of normally operating specifications Replacement Parts When replacement parts are required be sure the service technician has used replace ment parts specified by the manufacturer Unauthorized substitutions may result in fire electric shock or other hazards Safety Check Upon completing of any re
19. AN port to Auto DHCP After a reboot the Network gt WAN IP Address should now show a valid IP address for the connected network Omnia Processing O Omnia Processing In the Omnia Processing dialog select a processing preset best suited to the audio source material If unsure use Normalize If no audio processing is desired select the processing preset as none Only processing preset selection is available on the front panel interface Preset adjustment can be done via ProSTREAM s internal web configuration by means of a web browser QUICK START 3 Note All ProSTREAM local outputs XLR Livewire and headphone output are post process and pre en code The post process audio can be monitored via the output metering of the Status display AGE LIMIT a Ad 20 20 Processing adjustments will be heard real time on local outputs but will be heard with a certain amount of delay in the encoded stream A small portion of this delay is introduced by the encoder while a much larger portion is introduced by buffering in the server and the client used to listen to the stream Note Switch headphone monitoring between pre processed audio and post processed audio by pressing the headphone volume knob and selecting Listen to inputloutput audio Codec 1 amp 2 Choices are MP3 AAC or None Common output settings are as follows MP3 Sample Rate 44100 Hz MP3 Channels Stereo MP3 Bitrate 16 320
20. C w sample rate 44100 Hz w Channels Stereo w Bitrate 96 24 to 320 kbps Transport ADTS v if not sure select ADTS Save The codec represents the manner in which the 1 4Mbps stream of un compressed audio data will be converted into a smaller data stream by means of digital compression ProSTREAM applies lossy compression algorithms to the processed audio in order to create a live data stream for end users via the Internet A lossy compression technique produces a data stream small enough to be delivered to the client via DSL EDGE wireless or any common Internet network infrastructure MPEG has released different standards as technology has required and each successive standard has built upon the previous yielding modern codecs which can deliver extremely clear audio at incomprehensibly high ratios of compression When selecting a codec there is a trade off between more modern compression standards which sound much better than older standards but may risk incompatibility with older client software and devices The core of this choice will likely be between MP3 MPEG Audio Layer III and the newer and aptly named Advanced Audio Coding AAC MPEG 4 with MPEG 2 components Many factors may be considered when choosing a codec to employ for the output stream Is content mostly vocal or musical How is the processor tuned 4 What types of clients are connecting to the audio stream 1 Telos Systems licenses Motion Picture E
21. If the server version is not known it will probably be the older protocol version 1 Stream ID If the SHOUTcast protocol version 2 is selected a stream ID must be entered Typically this will be 1 if only one stream is sent to the server Stream availability Allows defining if the stream is meant to be public and can be included in a server specific directory listings or private and should not be listed to the end users A good example of this is SHOUTcast DNAS which will publish any streams configured as public to http www SHOUTcast com 40 Section 4 ICEcast El toim ProSTREAM Stream 3 Adam Configure the parameters for stream 3 below Click the save button when done Target server ICEcast wi Audio codec Codec 1 AAC LC 44100 Hz 96 kbps Stereo w Server address e g 192 168 1 23 8000 Mount point m ee te Stream user name usually the user is source Stream password streampwd Metadata user name usually the user is admin Metadata password usually the same as the stream password Stream name ProSTREAM HiFi e g the station name Stream genre livewire Stream URL http TelosAlliance com Stream availability Save Target Server Set the target server to ICEcast Audio Codec Select which of the encoded streams will be delivered by this configuration ICEcast Server Address IP address port of the ICEcast server I E 192 168 2 200 8010 Mount Point Specify a unique U
22. MH LR PE ie PUE Ir ji Final Limit Output X Over this section contains no adjustable parameters The X Over crossover splits the audio from the WB AGC into 3 frequency bands so each band can be optimally processed The three bands are Lo bass Mid midrange voice and solo instruments and Hi treble There are no adjustable controls in the crossover section Low Mid Hi AGC Input Output A Final Limit 0 0 V LMH LR Final a p ie E Limit de ER J iz xe Output Middle AGC Drive Each band has a Drive Gate and Release control similar the the WB AGC 58 Section 5 Drive The Drive control adjusts the volume of the audio from the crossover into the compressor limiter for the selected band Higher settings will drive the selected band into more gain reduction Some EQ can also be done with the Drive controls ifone band is adjusted differently than the others Start by setting them equally though More drive will provide a denser more compressed but louder sound Less drive will provide a more natural and open sound Generally you will see these meters move faster than the WB AGC Generally between 5 and 10 dB of gain reduc tion is a good nominal amount Note that the Hi band may show less gain reduction than the others This is normal Gate Thisis a silence gate that freezes the gain when silence is detected to help keep noise from being brought up during program pauses The no
23. Orbit Automation for Radio 2012 10 27 23 25 08 641 Waiting for TCP connections on socket 9000 2012 10 27 23 25 14 581 Accept TCP connection on socket 9000 from 192 168 2 148 49296 lt nowplaying gt lt sched_time gt 7749700 lt sched_time gt lt air_time gt 84336000 lt air_time gt lt stack_ pos gt lt stack_pos gt lt title gt Wah Wah Man lt title gt lt artist gt Young Holt Unlimited lt artist gt lt trivia gt What It Is Funky Soul and Rare Gr lt trivia gt lt category gt MUS lt cate gory gt lt cart gt 01U lt cart gt lt intro gt 0 lt intro gt lt end gt lt end gt lt station gt RockLAB lt station gt lt du ration gt 227100 lt duration gt lt media _type gt SONG lt media type gt lt milliseconds left gt lt milliseconds left gt lt nowplaying gt 2012 10 27 23 25 23 292 Closed TCP connection on socket 9000 from 192 168 2 148 49296 2012 10 27 23 25 23 292 Exiting TCP thread on port 9000 34 Section 4 MetadataSend exe Destination address ip port 192 168 2 10979000 Send test TCP data Hello World This line ends with the press of the Enter key for a lt o gt or In 1 2 The Metadata Send program allows for direct push of data to the ProSTREAM on command Copying data from the Metadata Capture program and pasting into Metadata Send is acommon way of testing the script Note To emulate TCP data a linefeed is required Data should be entered with at leas
24. ProSTREAM to ingest incom ing data and pass along the desired pieces IE Track Artist for real time presentation within the playback client ProSTREAM ships with a set of metadata filters and you may be able to feed it with data that matches one of the formats it understands If your metadata source is not able to send data in one of the supported formats let us know and we ll be able to help ProSTREAM is currently able to support incoming data formatted with the following code pages http en NONE wikipedia org wiki Code_page Input code page encoding Output code page encoding Filter descriptions UTF 8 character encoding default 28 Section 4 ANSI Windows 1250 Central and East European Latin 1251 Cyrillic 1252 West European Latin 1253 Greek 1254 Turkish 1257 Baltic 850 Multilingual Latin 1 Western European languages e gt gt 9 8 932 Japanese DBCS Input Automated playback systems typically provide for submitting metadata to a streaming server Metadata connec tions are made to ProSTREAM via TCP UDP connections to port 9000 or RS232 serial connections with an RS232 to USB adapter If no automated data stream is available a manual entry form is included in ProSTREAM to allow manual entry of playlist information 2 Connecting RS 232 serial data requires the use of a USB to RS 232 adapter manufactured by SYBA Multimedia Fully
25. RL compatible string for the connection URL for the stream I E hifi to have the connect string for this stream be http 192 168 2 200 8000 hifi It is acceptable to specify an extension if desired such as mp3 or aac PROSTREAM CONFIGURATION 41 Stream User Name The default stream username for ICEcast is source unless it is overridden in the icecast xml configuration file Stream Password The stream password from the icecast xml configuration file Metadata User Name The ICEcast administrator username Note that the configuration will work without a metadata username but metadata will not pass to ICEcast or clients Metadata Password The administrator password from the icecast xml configuration file Note that the configuration will work without a metadata username but metadata will not pass to ICEcast Stream Name The name of the stream as displayed to clients Stream Genre Genre of the audio stream Stream URL Web address of the station s website Stream availability Allows defining if the stream is meant to be public and can be included in a server specific directory listings or private and should not be listed to the end users RTP to Progi kE AM Stream 4 Mam Configure the parameters for stream 4 below Click the save button when done Target server RTP wi Audio codec Codec 2 HE AAC v2 44100 Hz 46 kbps Stereo w RTP destination address e g 239 1 1 5 RTP destination port Time
26. S software is a good example of a streaming server SHOUTcast DNAS is avalable at http www shoutcast com broadcast tools A single SHOUTcast instance is capable of relaying both ProST REAM codecs and will require the configuration of 2 of the available 4 stream configurations SHOUTcast configuration file SHOUTcast operates by means of specifying a configuration file at launch typically sc_serv conf The following parameters are needed from the SHOUT cast configuration file portbase 8010 password streampwd adminpassword adminpwd At least two stream ID s should be specified streamid_1 1 streamid_2 2 QUICK START 5 Stream 1 A Stream 1 Stream Type SHOUT cast Codec Codec 1 Server Address SHOUTcast ip portbase example 192 168 2 200 8010 Server Password password example streampwd Stream Name Name of Stream sent to clients Stream Genre Genre of Stream SHOUTcast guidelines Stream URL URL of Station Website sent to clients example http TelosAlliance com Server version version 2 Stream ID 1 e gt gt gt 9 4 Stream Availability public A A http 192 168 2 200 2010 indechtmifsida1 Pr EG A sHoutcast Administrator x SHOUTcast DNAS Status SHOUT cast Server v2 0 0 29 posix linux x66 Status Song History Stream URL Admin Login Server Status Server is currently up and public no YF connection Stream Status Stream is up at 96 kbps with 0 of 12
27. TELOS PROSTREAM Encoder for Streaming Audio USER S MANUAL ProSTREAM manual v2 for ProSTREAM software v2 1 Applies to 2001 00254 Description Telos ProStream combines audio processing with MP3 and AAC encoding in one convenient single rack unit The AAC encoder supports AAC LC HE AAC and HE AAC v2 formats Can be fully managed and configured remotely with a web browser Features a wideband AGC 3 band compressor limiter EQ low pass filter and a precision look ahead final limiter Encodes the processed audio directly to MP3 or AAC streams and feeds a remote replication server at the ISP Streams can be tagged with now playing information received from automation systems Rackmount 1RU It Table of Contents 1 Quick Start 1 SCUINGS E eae eee eee ee er ar 1 AMO Sar oa ia rana roer neds ee nes 1 NCIWON as 3 45 06 46 fo cesa essa eee eee 2 OmniaProcessing 222 oo 2 ON Iss en nam inne Pees ee eek te eS 3 MES ove eae doe ee BAe ee SS Oe he ee ee 3 AAG 2 a ot eee pa ee be ee hs 3 Low Complexity 2 0 0 0 0 0000 eee 3 High Efficiency V2 we en rete ed ee 3 Stream Configuration 0 dae RES o WOR EERE EE RDO 4 SHOUTcast DNAS v2 0 Example 4 SHOUTcast configuration file aaa 4 SEAM E E eee Ae os 5 A IS TR 6 ICEcast Example amp u sar ds ars e e o en 7 ICEcast Config file o o eee ee ee 7 A TE 7 SEAS ea a oe ee ee eo ew Oe ge Bee 8 3 Controls and Connections 13
28. amendments to the copyright law regarding webcasting of sound recordings These new provi sions allow webcasting under the terms of a statutory license as a way to help webcasters get permission without having to go to each sound recording s owner The statutory license however has strict requirements that you must follow Some of these requirements include the payment of license fees limitations on the number of songs from the same album or artist that may be played in a three hour period called the sound recording performance complement a prohibition on publishing advance playlists and a requirement to identify the song artist and album on the website There are other requirements as well The Recording Industry Association of America provides quite a bit of information on copyright law as it applies to webcasting and both ASCAP and BMI have created license agreements that they are willing to grant to webcasters that they believe conform to the provisions of the new copyright rules for webcasting For additional information on the statutory license and other aspects of webcasting please visit the following sites The U S Copyright Office http www copyright gov The Recording Industry Association of America http www riaa com issues music webcasting ASCAP http www ascap com weblicense webintro html BMI http www bmi com iama webcaster index asp Streaming Server software 1 For more information on Livewire please visit http axiaaud
29. case Low dynamic range audio audio with high RMS and low peak levels will show more activity in the WB AGC bar graph and less activity in the multiband bar graphs The WB AGC responds to high RMS energy while the multi band section reacts to lower peak energy Multiband bar graphs may not indicate any action at all with some low dynamic range audio which is normal for Omnia processing This may occur with heavily processed commercials or music or with music passages of sustained level Wide dynamic range audio audio with low RMS and high peak levels causes the opposite to occur The multi band bar graphs become active while the WB AGC section appears to not respond as much The multiband AGC s can work aggressively with wide dynamic range audio while the WB AGC section indicates little activity The WB AGC section is designed to operate much slower than the multiband gain controls primarily because of the nature of each function The WB AGC operates on the audio s RMS energy During gain calculations the incoming audio s average level is established and gain adjustments if needed are made based on those calcula tions The WB AGC bar graph will appear to move slower as it makes changes over relatively long time periods The intent of the multiband gain control is to normalize the spectral balance and provide control of the peak levels Peak energy must be detected and adjusted in a quick and accurate manner but not interfere wi
30. cast Stream Information server Status Server is currently up and public no YP connection stream Status Stream is up at 96 kbps with 0 of 128 listeners 0 unique Listener Peak 0 stream Name ProSTREAM HiFi Content Type audio aac Stream Genre livewire stream URL hittp TelosAlliance com 30 Section 4 Icecast Stream Information Stream Title Stream Description Content Type Mount started Bitrate Current Listeners Peak Listeners Stream Genre Stream URL Current Song Connected VLC Media Player http 192 168 2 200 8000 hifi PROSTREAM CONFIGURATION 31 Custom Metadata Filter Scripts The scripting engine inside the ProSTREAM uses the Lua Programming Language All data arriving via port 9000 UDP TCP and RS232 will pass to the Lua script Scripts are managed via the Metadata filters page at http prostream ip filters htm Lua Script Example The following Lua script will engage the Lua Line Parser when written to a file and saved as a ProSTREAM metada ta filter UseLineParser function OnLineReceived text endOfLine local title local url http TelosAlliance com title text LogInfo LineParser Script title title url url n SendMetaDataSong title url Send metadata to application end Save this script with a name like LineParserRaw Lua and use the filters page of the ProSTREAM to load the file to the ProSTREAM Th
31. d 8 8 4 4 lt html xmlns http wwow w3 org 1999 xhtml xml lang en lang en gt lt head gt lt meta http equiv Content Type content text html charset utf 8 gt lt title gt Public IP lt title gt lt head gt lt body gt lt body gt lt html gt OMNIA PROCESSING 53 5 Omnia Processing The dynamics processing algorithms in use in the ProSTREAM are based upon Omnia Audio s highly successful Omnia 3net a hardware based DSP audio processor ProSTREAM employs the following Omnia processing architecture Input Wideband AGC 3 Band Combined Compressor Limiter Adjustable Bandwidth Low pass Filter Final Look Ahead Limiter Output Processing Preset Editor Preset Management All audio processing adjustments are performed in the Preset Editor which is only available via the web interface A pre set represents all of the control values for each control in the Omnia processor When a preset is chosen for the processor control values for the processor s settings are loaded into the processing structure and applied to the input audio Presets allow different processing setups to be loaded into the processor Factory presets have been provided as starting points for customizing your sound It is possible to gain dramatic sonic improvement from ProSTREAM s Omnia processing right away using one of the facto ry presets Start by selecting one from the Omnia Processing menu and then click
32. dB range It acts like an automated hand on the pot keeping the overall level to the 3 Band compressor limiter nice and consistent Drive Once the Input Gain is set you can adjust the Wide Band AGC Drive if desired This is measured using the WB gain reduction meter This meter reads from the top down where 0 is no gain reduction at all Normally this should read down to between about 10 15dB with normal OVU program audio playing this will allow room both above and below for automatic gain adjustment Gate This is a silence gate that freezes the gain when silence is detected to help keep noise from being brought up during program pauses The normal setting is On but the silence gate can be defeated by setting this control to Off if desired Release This controls the overall speed of operation of the WB AGC Slow will preserve more of the natural dynamic range in the program material Fast will bring up lower level passages faster and react faster to program level changes Medium is a nice compromise between the two Bass Input Output f D D n 10 10 Final Limit Output Phat Bass Some bass boost is normally used when processing to balance out the spectrum and add some punch These two controls adjust the amount of the ProSTREAM s bass enhancement section They are more than just simple EQ s If your source material has it ProSTREAM will put it in the m
33. data Username lt admin user gt example admin Metadata Password lt admin password gt example adminpwd Stream Name ProSTREAM LoFi sent to clients Stream Genre livewire Stream URL URL of Station Website sent to clients example http TelosAlliance com Server version version 2 Stream Availability public QUICK START 9 ol http 192 168 2 200 3000 sl Icecast2 Status Administration Server Status Version Mount Point hifi mzu MM xspr Stream Title ProSTREAM HiFi stream Description ProSTREAM HiFi Content Type audio aacp Mount started Sat 04 May 2013 20 08 43 0500 Bitrate 96 Current Listeners o Peak Listeners 0 Stream Genre livewire Stream URL http TelosAlliance com Current Song Mount Point lof IO msu MM xspr Stream Title ProSTREAM LoFi stream Description ProSTREAM LoFi Content Type audio aacp Mount started Sat 04 May 2013 20 08 48 0500 Bitrate 15 Current Listeners 0 Peak Listeners O Stream Genre livewire Stream URL http TelosAlliance com Current Song INTRODUCING PROSTREAM 11 Introducing ProSTREAM The Telos Systems ProSTREAM is a hardware based audio processor and web stream encoder device in a compact 1U rack mount chassis The ProSTREAM will process and encode audio sourced from either rear mounted analog audio inputs or via Livewire audio over IP technology ProSTREAM uses Omnia Audio s proven audio processi
34. de hollow rectangle cursor In erase mode turning the knob erases or restores characters While in erase mode press the main knob to return to text entry mode or press the Back button to exit field editing altogether CONTROLS AND CONNECTIONS 17 Web Configuration The ProSTREAM has an internal web server accessible via a web browser The web interface can be reached by pointing a web browser to the IP address of either LAN or WAN network for example http 192 168 1 157 F sen Prog TREAN Stream 3 Stream 4 System You may also click one of the following links to listen to the encoded stream using your media player 6 6 b Codec 1 asx pls m3u Codec 2 asx pls m3u NOTEI ee er a eee ee NOTE A Javascript enabled browser is required The Silverlight plug in from Microsoft is required for viewing the audio meters and for preset editing If you do not already have this plug in installed you will be prompted to do so the first time you access a page that uses it For best compatibility we recommend the Internet Explorer browser Default Credentials The default credentials to access the web interface are username admin password Telos 18 Section 3 NOTE For security reasons it is very important to change the default login credentials Failure to do so may give others access to your ProSTREAM The login credentials can be changed on the front panel under the Syst
35. distortion Automatic Gain Control AGC There are two sections to the AGC bar graphs display wide band automatic gain control WB AGC and multiband automatic gain controls The multiband AGC bands are low frequency mid frequency and high frequency The bar shows the average value of the gain reduction while the floating pill indicates the peak value of gain reduction The Omnia processor algorithms automatically adapt the style of compression limiting control being employed on a moment by moment basis This can be deduced if the metering is studied over time During normal operation the bar graphs will have a dynamic bounce Every now and then the processor will react quickly and show a larger amount of gain reduction This action will recover very slowly and return to rest with the main bar graph This action is more apparent on dynamically textured audio Another feature unique to Omnia processing is processor hold During brief pauses in audio the bar graphs will freeze indicating the processor is in the hold mode of the algorithm This can occur when there is dry vocal audio in the signal Bar graphs will indicate differently for pre processed audio than with widely varying audio level content Audio signals which lack dynamic range whether naturally or by prior processing will possess a lower peak to average ratio Conversely audio with wide dynamic range possesses a higher peak to average ratio ProSTREAM adapts to each
36. ed through an external server Test Stream Connection URL s Codec 1 Codec 2 PLS http ip address play pls PLS http ip address play2 pls M3U http ip address play m3u M3U http ip address play2 m3u ASX http ip address play asx ASX http ip address play2 asx RAW http ip address 8000 RAW http ip address 8010 38 Section 4 Streaming Services A streaming service can provide all that is needed for distribution of ProSTREAM s encoded audio stream Typically pricing viaa monthly base rate and bandwidth costs The streaming service provider will provide the stream configurations for ProSTREAM and return to the client any number of services including stream link URL s to provide to listeners A streaming service can also provide failover and optional configurations should a connection be lost Stream Server Service Providers 4 TritonDigital http www tritondigital com Akamai http www akamai com LimeLight http www limelight com 4 Stream Guys http www streamguys com Additional streaming services can be found at http www radiotoolbox com hosts SHOUTcast F gt 3S Pros REAN Streami Mam Configure the parameters for stream 1 below Click the save button when done Target server SHOUT cast w Audio codec Codec 1 AAC LC 44100 Hz 96 kbps Stereo w Server address 192 168 2 200 8010 e g 192 168 1 23 5000 Server password Stream name e g the stat
37. em dialog NOTE The ProSTREAM web configuration requires Javascript and Microsoft Silverlight for real time Omnia processor adjustment Some settings and values may be locked or unavailable ifthey depend on other configured options PROSTREAM CONFIGURATION 19 4 ProSTREAM Configuration Audio Menu Audio 1 0 interface XLR analog Input audio gain 0 0 dB 22 5 dB The Audio Input Level is adjustable from a OdB level of gain to 22 5 dB level of gain Gain level is not necessary as 4v balanced audio will show input status at a setting of Odb Output audio gain 95 2 dB 0 0 dB The Audio Output Level affects the signal level for the ProSTREAM s rear outputs and Livewire returns The default setting of 0 0 dB will direct the full level of the processed audio to the ProSTREAM outputs Note The post process audio to the encoder is unaffected by the Audio output Level setting internally 20 Section 4 Livewire Livewire is an audio over IP technology from Axia Audio Livewire audio requires that specific conditions be met in the network switching environment to use Livewire functionality As a multicast IP protocol requiring both IGMP routing and QoS parameters common consumer network routers and switches are unable to use Livewire IP technology For more information please visit http axiaaudio com livewire Livewire connections should utilize the LAN port and typically imply a manual IP configuration Inpu
38. ep on it Spend time adjusting and then listening and when the system gets to a point where it sounds good stop When making changes to processing ears become less sensitive to the adjustments Spreading the adjustment period over a number of days is recommended OMNIA PROCESSING 55 The following section will detail each control if you d like to customize one of the factory presets to get your own custom sound If you are using a factory preset as is please read the Input and Output adjustment sections as these are very important for proper operation and sound quality Processor Adjustment Bypass The Bypass control which appears in each menu when turned ON will completely bypass all processing effectively connecting the input directly to the output Input Input Output 6 6 Final E Limit de a Output ies Ge 36 36 dBFS ES Input Gain Left i i Gain Right i i Proper input gain is essential for optimum processing Gain Set the Gain Left and Gain Right controls so that the peak reading Input meters are peaking just into the red 99 at 12 dBFS with normal OVU program audio playing WB AGC Input Output A Final Limit A LR b b 1 1 0 Final y a Limit ki iia T j 24 24 45 45 15 Output 5 a a a 36 36 25 25 25 dBFS Wide Band AGC 56 Section 5 The Wide Band AGC performs overall gain riding to the input signal over a 30
39. f Contents Stream name u zu ann A me en 2 RTP interface seen een ee 2 DIME a Reo eee eee a ee eo ee ae 43 Target server eso E00 44 Goo Gee e 43 Server address o o ooo 43 Use Authentication lt lt 43 SUCaMmusernaMe ic bees be eee sungen 44 Stream password o o a a 44 Publish path 4 2 22 ae a AR ee 44 SUCaMMMGMIe oo ur ee oh eee eee ee 44 i lt n ae en PaO ad a Se eee eS 44 Advanced Options 3 2 8 5 5 40 06 ase Ada 45 Mera da aaa a A 45 PING SErVIC Bp hag car Peo be eee he ee rear 46 MOS eas gene eee a ee ee oe ee 46 Ping Interval hee ey a ate me SE en ee ne end 46 Alarm after lt gt naaa pad oo Hea es oem ee ee 47 Configure Static Routes 2 o 47 Destination Address 22 22 2 22m ee ee 47 Gateway Address 47 INTE ote 6 an da ee ee ee ee ee 47 View network diagnostics 2 mm 48 Interface configuration 22 22mm 48 Link information 222 oo on 48 PIS 2c es as arde a aa A ee 48 POUNG e u er de ch are en ae oe Sen 49 View memory usage diagnostics 2 2 22mm n een 50 View system diagnostics 2 2 2 2 2 een 51 View frontpanelimage 2222 oo onen 52 Display public IP works only if DNS is configured 52 TELOS PROSTREAM VII 5 Omnia Processing 53 Preset EUIO aea e pros oo oe ee oe e Gee a 54 Processor Adjustment Overview 54 Processor Adju
40. ge occurs it copies the contents of the file to the TCP port of the ProSTREAM The download will also contain a PDF file explaining application use Command Line usage Syntax WatchFile2TCP exe run configuration file Key run Start the instance when loaded same as pressing the Start button manually Example WatchFile2TCP exe run configuration_1 cfg PROSTREAM CONFIGURATION 37 Streams ProSTREAM can be configured to push connect to up to four separate streaming servers Set the target server to match the required streaming server protocol 2 Pros REAM Stream 1 Mam Configure the parameters for stream 1 below Click the save button when done Target server SHOUT cast ICEcast RTP RTMP Adobe FMS Wowza etc HTTP Streaming ProSTREAM contains a built in mini server on TCP port 8000 This server can accept only a few connections and should not be used as the main streaming server or be deployed to the public The HTTP server is intended to be used for stream monitoring with a player or to have another media server pull the stream from ProSTREAM allowing monitoring of the encoded stream This is helpful in troubleshooting server connections or just as a quick way to test everything is working as expected The HTTP server is also useful when adjusting audio processing parameters as the audio can be monitored with compression The audio delay should also be shorter than listening to the stream deliver
41. h a simple setup where the ProSTREAM is fed analog audio the network settings are configured via DHCP and the stream is sent to a ShoutCAST v2 server If your setup is different you may safely skip this section If this is the first time you have used a ProSTREAM you may to have a look at the Front Panel and Entering Text sections before you proceed Settings Erom the front panel of the ProSTREAM set the following menu options Audio Audio Connect an audio source to the XLR inputs and select Audio Input XLR AUDIO Audio Input HLR Verify Input Gain Setting is 0 0 db AUDIO Audio Input Gain 2 Section 1 Audio signal should now be visible on the input metering AGE LIMIT Reh 20 Increase INPUT gain by pressing the encoder knob turning and then pressing again to set the value Network w Network The ProSTREAM offers WAN and LAN Livewire network ports In most configurations you only need to connect the WAN port to the network and the LAN port is set as disabled When using Livewire the LAN port is connect ed to the Livewire network and the WAN port is connected to the public outside network NOTE Do not connect both ports to the same network Unless you are using the LAN port with Livewire Audio over IP configure it as disabled NETWORK LAN Mode Disabled Connect the WAN Ethernet port to the network Under Network gt WAN Mode set the W
42. io com livewire 2 For more information regarding Omnia processors please visit http omniaaudio com CONTROLS AND CONNECTIONS 13 3 Controls and Connections Overview The Telos ProSTREAM is very simple to set up and use having a minimal amount of controls and an easy intuitive interface Here we ll take a look at the front and rear panels of your ProSTREAM The packing box contains Telos Systems ProSTREAM unit AC power cords Euro 220v US 110v unterminated RJ45 network cable 10 rack screws warranty registration form warranty information sheet Front Panel pr 1 Power LED The blue power LED is located to the upper left of the display When the unit is first powered the power LED will flash until the unit is fully booted When booted the power LED will light solid 2 Display Screen The OLED display screen displays audio meters and configuration information Use the display control knob and return button to navigate the ProSTREAM s options and settings 3 Control Knob The main control knob next to the display works as a selector Rotate the knob until the desired option is displayed then press the control knob to select the option The control knob is also used in similar fashion for character selection in text entry fields 4 Back Button The back or escape button is adjacent to the control knob Pressing it steps back or exits from a selected option or dialog Pressing it repeatedly wi
43. ion name Stream genre stream URL Server Version Stream ID stream availability PROSTREAM CONFIGURATION 39 Target Server Set the target server to SHOUT cast SHOUTcast Server Address IP address port of the SHOUTcast server I E 192 168 2 200 8010 SHOUTcast Server Password Value of password from the SHOUTcast configuration file Stream Name When an Internet user or device connects to the stream the Stream Name will be sent in the initial meta data burst This title is typically displayed on the end user s player or device Capitalization and punctuation of Stream Name is fine and will be displayed as such in the end client Stream Genre SHOUTcast DNAS server requires a genre field for all incoming connections While the genre may not be displayed on the end user s device or client application some streaming servers and services may publish the existence of the encoded audio stream in a directory SHOUTcast recommends the genres listed in their forums http forums winamp com showthread php t 303241 Stream URL When an Internet user or device connects to the stream the Stream URL will be sent in the initial meta data burst This value can be set to an URL that is common to all the songs streamed to the SHOUTcast server e g the website of the radio station Server version ProStream can connect to SHOUT cast servers using SHOUT cast protocol version 1 or a newer enhanced SHOUT cast protocol version 2
44. is script is an example of a basic script that takes any line of text submitted and pass it directly though the metadata processor and reports the submitted characters to both the stream and the ProSTREAM system log when selected as the ProoSTREAM s metadata filter Code Breakdown UseLineParser This line configures the filter to process the incoming data one line at a time Another available option is UseX mlParser which will configure the filter to process the incoming data as XML If neither of these functions are called the filter will default to processing the incoming data one character at a time function OnLineReceived text endOfLine This function is called to deal with the incoming data when the line parser is used The line parser accumulates the incoming data until a new line or line feed character is detected If the incoming line is very long the function may be called before an end of line character is detected The text variable will contain the line data The endOfLine variable will be true ifthe the function was called in response to an end of line character or false otherwise local title local url http TelosAlliance com The local keyword introduces variables used by the script The variable title is set to empty initially The URL is set to the home URL for the stream You may configure a different URL string here if required by your player LogInfo LineParser Script title title
45. ix and with muscle Making changes to the bass is done using the following parameters and for maximum effectiveness in the order listed NOTE Settings of 0 0 apply no bass boost 1 Inthe Bass menu increase the amount of Deep Bass boost to taste This is the lowest kick drum bass so be sure to monitor with speakers or headphones that can reproduce bass below 80Hz 2 Inthe Bass menu increase the amount of Phat Bass boost to taste This special bass effect can help smaller speakers sound like they have more bass than they really do 3 Increase the drive to the LF AGC in the LO AGC screen 4 Speed up the release times of the LO AGC section 5 Slightly increase the low control in the mixer section OMNIA PROCESSING 57 When processing moderation is the key If all of the above steps are utilized in the pursuit of more bass severe low frequency over enhancement can occur Excessive bass boost can produce the illusion that the presence and high frequencies have been lost They are still there but are being acoustically masked by the lower frequencies Generally an increase in the Bass menu s bass boost functions alone will provide more than sufficient enhancement to the low end Phat Bass Phat bass widens the higher low end frequencies in an effort to expand bass sound on smaller playback speakers Deep Bass Deep bass focuses on frequencies of 80hz and below X Over Input Output A Final Limit 11 0 v L
46. ll return you to the main screen and will also toggle between the main and status screens 5 Headphone Jack 1 4 Stereo TRS Jack for monitoring the input and post process output audio 6 Headphone Volume Knob The headphone volume knob controls the output level of the audio being sent to the headphone jack Pressing the headphone volume knob will toggle the headphone output between monitoring the input audio and the post process output audio 14 Section 3 Back Panel 1 AC Mains connection 110 220v auto switching power connection Use supplied power cord appropriate for your area 2 LAN Network The LAN network jack is a 10 100 RJ45 jack and can be used with a Livewire network for source audio and post process audio monitoring 3 WAN Network The WAN network jack is a 10 100 RJ45 jack typically used to send the encoded streams to streaming servers NOTE ProSTREAM provides two network interfaces for configuration flexibility If you are not using Livewire then you only need to configure one interface Make sure to leave the other interface as disabled Do not connect both interfaces to the same network Analog Audio Inputs female 3 pin XLR left amp right Analog Audio Outputs male 3 pin XLR left amp right USB RS232 metadata input with optional USB to Serial Adapter P N 2091 00140 wa El Parallel Interface no current functions Status Display 2 Status The Status screen shows the a
47. ng algorithms to balance the input audio according to the program s format The processed audio is then encoded by two distinct encoders ProSTREAM can send the encoded streams to up to four streaming servers or streaming service providers The processed audio is also sent to XLR and Livewire outputs for monitoring The ProSTREAM can also accept and parse incoming metadata The metadata is then sent along with the stream to the streaming server which will then distribute it to end listeners It is important to note that listeners always connect to the streaming server never directly to ProSTREAM FYI MPEG License amp Music Copyright Musical compositions and sound recordings are creative works that are protected by the copyright laws of the United States title 17 U S Code and other countries Under U S law the owner of a copyright has the exclusive right and may authorize others to reproduce the work use parts of the work in a new creation distribute the work in whole or in part and to publicly display or perform the work including on web pages and through webcasting With few exceptions it is illegal to reproduce distribute or broadcast a sound recording without the permission of the copyright owner It is your responsibility to comply with the copyright laws ofthe United States and other countries in which you broadcast and to pay all applicable royalties to the copyright owners when you become a webcaster There have been recent
48. o o o 33 Syslog Server 2 222 o o 35 Hetl o a se aa ee pea e 36 TELOS PROSTREAM Command Line usage 36 MM a Be a a 37 PUP SWC AMINES eas oe ee na rd EA ee 37 Streaming Services oaa 38 Stream Server Service Providers aaa 38 cU 2 EEEE EEEE E E hen 38 Target Server san ei o DEW SET e 39 SHOUTcast Server Address 2 222 Coon 39 SHOUTcast Server Password 2 222 22 o o 39 Sam NONE zum oe ana Gk Se ye ee gt 4 39 SCAN GENE ooo a wack eee ee ee eee ee Oe 39 a 6 oe eee eee ee ee eae a ie 39 SEVA ses e Aho ae a ee oe ha 39 Sed 624 eee eee oo eee sen eigene 39 Stream availability 2 ee ee ee ee 39 Ce ee eae eG eee eee ee OG EE ee eee 40 Target Server 2 tt ee ee es 40 A ey by ot SC ee be eo eee 40 ICEcast Server Address 2 0 ee ee ee eee 40 MOUDE PODE e eh oo eee 4 a eee ee y es 40 Stream User Name lt 3 305 ca a2 aa Bre BR aa 41 Stream Password eo u eo u de Se ae a di 41 Metadata User Name 41 Metadata Password 2 222 oc o o 41 Stream Name mm as o oe ie 41 SUITE ac ae e oe ooo Boe eee ee eo 41 MEMUR esser Be nee ew ee ee ana 41 Stream availability 41 RP a ee ee ee ad we 41 Target Servel IE 42 Audio Codet 2 eek awama 6 Gee sara ss 42 RTP destination address 42 RTP destination port oaa 42 Time to live TTD oo on 42 V Vi Table o
49. pairs to this product ask the service technician to perform safety checks to determine that the product is in proper operating condition Cleaning Do not use liquid cleaners or aerosol cleaners Use only a damp cloth for cleaning the exterior of the product only
50. rate The output bitrate constraints will differ depending on which codec is selected and whether the encode is set to mono or stereo The range of each codec is shown in the table below Codec Bitrate Range MP3 16 to 320 kbps AAC LC 24 to 320 kbps HE AAC 24 96 kbps HE AAC v2 14 56 kbps Transport AAC only AAC audio encoding does not specify a container form for packaging the data stream The Transport option allows you to select one of four available formats ADTS ADTS CRC ADIF or RAW If you re not sure about this setting just keep the default value ADTS or select a transport format that is understood by the audio player you are targeting some testing may be required ADTS The default transport container to use for all AAC codecs is Audio Data Transport Stream ADTS ADTS encapsu lates the packetized elementary streams of encoded AAC audio and metadata for transport over IP networks ADTS CRC ADTS CRC includes CRC error correction and stream synchronization features to the ADTS transport and can be used for maintaining transmission integrity when the signal is degraded ADIF Audio Data Interchange Format ADIF isa transport container more suited to files then streaming as the data stream is preceded with a header packet and then raw AAC data follows ADIF may be used in applications where the audio will be muxed with other audio channels for multi channel transport but is not likely to be used in traditional streaming
51. reset This means that factory presets can always be restored even if you delete them to remove them from the preset list This IS NOT the case for user presets Deleting a user preset is final El lo z Omnia Processing Pros REAM Omnia Processing Mam This page allows you to manage your Omnia presets Right click on the preset name and select Save As to save a backup copy on your PC or use the provided links to copy rename or delete a preset You can also Please do not use your browser s back or page refresh buttons on this page Doing so may repeat the last Available Omnia Presets WARRANTY AND APPLICATION CAUTIONS 63 6 Warranty and Application Cautions ProSTREAM LIMITED WARRANTY This Warranty covers the Products which are defined as the various audio equipment parts software and accessories manufactured sold and or distributed by TLS Corp d b a Telos Systems hereinafter Telos Systems With the exception of software only items the Products are warranted to be free from defects in material and workman ship for a period of two years from the date of receipt by the end user Software only items are warranted to be free from defects in material and workmanship for a period of 90 days from the date of receipt by the end user This warranty is void if the Product is subject to Acts of God including without limitation lightning improper installation or misuse including without limitation
52. rmal setting is On but the silence gate can be defeated by setting this control to Off if desired Release This controls the overall speed of operation of the compressor limiters Slow will preserve more of the natural dynamic range in the program material Fast will react faster to program level changes Medium is a nice compromise between the two Mix Input Output AGC Final Limit Input TT ive L MH LR WB F Final AGC Limit Output Middle The final mixer level controls set the output level of each of the 3 compressor limiter bands into the final look ahead limiter Note that it is possible to reduce the level below 0 as well as increase it Level Low Middle High While some EQ ing can be done at this stage be careful not to turn one band s mix level up too much higher than the others This will cause too much of that band s signal to hit the final limiter causing possible undesired effects such as overload excessive limiting of one band s audio or pumping It is generally better to leave these set at their default settings and use the Bass and Drive controls to EQ the sound to your liking Then if further correction is required you can reduce the level of a particular band here if needed such as reducing the High mixer if the audio sounds too bright Try to use the mixer only to reduce rather than boost as a rule of thumb OMNIA PROCESSING 59 Final Limiter
53. s you may send any information here it does not have to be song related Send metadata to application The Lua language uses two hyphens as a comment marker The Lua interpreter will ignore any lines that begin with two hyphens This provides a means to mark up or document the source file with notes for future reference but has no effect on the function of the script In this case the comment is a reminder of what the role is served by this line of code end The end statement signifies the end to the commands which comprise the OnLineReceived function Metadata Tools Metadata filter creation and tuning can be as nuanced as tuning an audio processor In order to provide real time control of the filter process some helpful tools are available which may assist with the process Metadata Pack http omniaaudio com software metatools download Metadata Pack contains two Windows EXE programs MetadataCapture exe and MetadataSend exe The download also contains a PDF file explaining application use PROSTREAM CONFIGURATION 33 MetadataCapture exe Local port incoming T 5000 Stop Capture Metadata Capture application allows the TCP or UDP data from a remote automation system to be routed to this application to capture a precise example of what data is being sent by the automation system to the ProSTREAM When active all data will be dumped to a file with timestamped delimiters Sample Output from Wide
54. stment 22 222mm 55 Bypass e names lA AA 55 NOU Se Sty whe ee ee ee eee ee ee 55 Gd 2 2 eae he sopas eee es Rae 55 WBAGC soe emee terigp Fab ee aoe Segoe 55 DO sms le dress ee a a ee 56 GIs 66 eee ee eee eee eee ee hun 56 RUC 25 eee ee hoe ERD OS eA eS 56 DAS u oe a eee ee eee ee y y 56 Phat Bass 2 5 2 bo ade aaa da ae 57 Deep Bass somente aa Ew 57 ROVE ria era ee Be as 57 Low Mid Hi AGC 254000 0 bos ee ee 57 A an ee pea 3 58 Ges gee bee ee oe te eee ee 58 ROCK ao earn raise sanan aa 58 Wie a see oe ee eee ee ee eee eee ee be 58 Level Low Middle High 58 Final WI se rosa ade ar el lo 59 ETE 59 DEU comas oras ae sea 60 Gain Left amp Right 60 Output Filter ee a de la ie 60 Managing Presets 5 wa ann a a eS 61 6 Warranty and Application Cautions 63 7 Specifications 65 8 Safety Notification 67 QUICK START Quick Start Streaming with ProSTREAM involves the following primary tasks 1 select the audio input configure the network settings select an audio processing preset select the codec used to encode the stream and a ee ae select a destination server to distribute the stream to the end listeners Telos ProSTREAM Audio Source 5 Analog XLR or LiveWire Omnia MPEG Stream AES optional i Processor l encoder Streaming server ShoutCAST server Internet listeners 1 This section walks you throug
55. t Livewire channel destination Enter the channel number of an active Livewire IP audio source channel generated by another Livewire device Output Livewire channel source Enter a unique channel number to appear on the Livewire audio network connected to the ProSTREAM LAN Livewire network jack PROSTREAM CONFIGURATION 21 Network Menu Manual Y 192 168 2 109 255 255 255 0 0 0 0 Auto DHCP w 192 168 0 101 255 255 255 0 192 168 10 1 The ProSTREAM is equipped with two RJ45 gigabit network ports marked LAN Local Area Network and WAN Wide Area Network The networking settings of the ProSTREAM are of IPv4 conventions and must be assigned an IP address before the ProSTREAM willcommunicate with any other devices 22 Section 4 LAN Interface Mode Auto DHCP IP address is provided by a DHCP server on the network Note Livewire network devices are typically configured with a Manual IP address not DHCP MANUAL A standard IPV4 IP address must be specified DISABLED Disable the LAN port IP Address Auto DHCP The IP Address field will show current IP address or 0 0 0 0 if no address is assigned MANUAL A valid IPV4 IP address must be specified Netmask Auto DHCP The Nemask field will show the value assigned by the DHCP server MANUAL A valid IPV4 netmask must be specified Gateway Auto DHCP The Gateway field will show the value assigned by the DHCP server MANUAL
56. t one RETURN key press at the end of the line The download will also contain a PDF file explaining application use Syslog Server File Options Display Emergency Alert Critical Error Warning Notice Info Debug About m s max 10000 lines 192 168 2 109 Date 5 7 2013 5 52 01 AM 3 7 2013 5 52 01 AM 3 1 2013 5 52 01 AM 3 1 2013 5 52 01 AM 5 7 2013 5 52 01 AM 3 1 2013 5 52 01 AM 5 7 2013 5 52 01 AM 5 7 2013 5 52 01 AM 5 7 2013 5 52 01 AM 5 7 2013 5 52 01 AM 3 1 2013 5 52 01 AM 5 7 2013 5 52 01 AM 5 7 2013 5 52 01 AM 5 7 2013 5 52 01 AM 5 7 2013 5 52 01 AM Source 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 192 168 2 109 51 Facility Locall Locall Locall Locall Local Locall LocalO Locall Local Locall Locall Local Local Locall Locall PROSTREAM CONFIGURATION Message Core Info meta_song title e 1977 original Broadw Core Info Send metadata to SHOUTcast v2 server at Core Info Title XML encoded e 1977 original Broz Core Info Url XML encoded http TelosAlllance Core Info ShoutcastV2 UpdateMetadata CodePagel Core Info Send metadata to ICEcast server at 192 16 Core Info Title URL encoded e 20 6281977 2001 Core Info Url URL encoded https32 2f 2HTelos Core Info
57. test for ping response Ping Interval Specify the interval in seconds to wait between ping attempts Alarm after Trigger an alarm after a specified number of seconds of failed attempts Must be equal to or larger than the Ping interval The ping service is not configurable via the front panel PROSTREAM CONFIGURATION 47 Configure Static Routes Static Routing allows path selection for specific connections A static route allows explicit specification of the gateway and the network port WAN or LAN Destination Address Destination address can be expressed as an IP address or a network range in CIDR notation cidr flsm supernet calculator IE 192 168 0 0 24 expresses the same information as 192 168 2 0 255 255 255 0 in network speak Note If a single IP address is entered ProSTREAM will append the IP address with 32 to indicate a single IP address in the range Gateway Address A gateway is an IP address of a router or a device which can speak to multiple networks Interface Interface specifies which physical network connection the ProSTREAM should use for this communication LAN and WAN refer to the two back panel network ports Note The Gateway Address must be within the range specified for the selected port as per the ProST REAM s Network configuration or the route will not be accepted 48 Section 4 View network diagnostics Network diagnostics will present the standard Linux output of
58. tested and supported for use with the ProSTREAM Order Telos part number 2091 00140 PROSTREAM CONFIGURATION 29 Process The most generic method of metadata parse is provided via the Line Parser Sample metadata filter select metadata filter Input code page encoding Output code page er As stated in the metadata table in the metadata webpage Line Parser Sample This file implements a metadata filter that will parse strings that look like this t title lu url An where n stands for a newline character If the playback system has mutable output to TCP the output string may be able to be constructed for the ProST REAM If so the key parameters would resemble the following Playlist Data Output IP address 192 168 2 109 IP of ProSTREAM metadata port 9000 string output t title artist u http mystation org n The automation system would then submit that string of characters via TCP to 192 168 2 109 9000 where the Line Parser Sample Lua filter extrapolates the two variables from the input string and passes them to the encoder The Line Parser Sample filter will also log both successes and failures in the Prostream system log Note The Lua Line Parser requires that TCP strings be terminated with a line feed n character This is the indication the line filter uses to start processing the data Character string parsers often used with UDP data sources do not share this requirement SHOUT
59. th the sonic integrity of the audio signal For this reason the multiband gain controls operate faster with special background instruc tions to govern their behavior and strictly on an as needed basis 16 Section 3 Limit The limit bar graphs monitor the level to which the processor is engaging gain reduction in the post process audio for each the left and right channels Entering and Editing Text in the Front Panel UI Since the ProSTREAM s user interface consists of a selector knob and back button the method for entering text or numeric information may not be immediately obvious This section describes how text entry and editing is accomplished The task seems complex at first especially when described in words but it is very simple once you have a chance to practice it a bit similar to learning to tie one s shoe laces When a text field is displayed the pencil icon Bl indicates that the field is changeable Press the main knob to enter one of the edit modes The edit mode is indicated by the cursor shape a solid cursor indicates text entry mode while a rectangle outline cursor indicates erase mode text entry mode solid cursor BY fe ES In text entry mode turning the knob cycles through all available characters Press the main knob to select the current character the cursor will move to the next character position While in text entry mode pressing the Back button once switches the cursor to erase mode erase mo
60. tion with the dealers sale of the Products SPECIFICATIONS 65 Specifications Line Input 4dBu input THD N Pro Pro lt 0 03 12dBu 1 kHz Sine Freq Response 1dB 25 20 kHz Head Room 18dB Dynamic Range gt 87dB Unweighted gt 90 dB A Weighted Crosstalk Over 80 db Output Clipping 22dBu Output Impedance 50 Ohm differential Input Impedance 6K Ohm differential Analog to Digital Converter 24bits Digital to Analog Converter 24bits Power 115Vac 14 2 Watts ProSTREAM Self Test 1 Press and hold the Headphone Volume Knob in during power up until the screen activates Release Headphone Volume Knob and then press the Control Knob Activate all front panel controls to test function A Once complete the Frontpanel status will confirm OK to indicate controls are good SAFETY NOTIFICATION 67 O Safety Notification E ae 10 11 12 13 14 This symbol wherever it appears alerts you to the presence of uninsulated dangerous voltage inside the enclosure voltage which may be sufficient to constitute a risk of shock This symbol wherever it appears alerts you to important operating and maintenance instructions Read the manual Read All Instructions All safety and instructions must be read before operating the product Retain All Instructions All safety and operating instructions must be maintained for future reference Heed All Warnings All warnings on the prod
61. to LAN to broadcast stream to Local Area Network PROSTREAM CONFIGURATION 43 RIMP RTMP Adobe FMS Wowza etc w Codec 2 HE AAC v2 44100 Hz 45 kbps Stereo w ProSTREAM LoFi Target server Set the target server to RTMP for RTMP streaming services Service providers like TritonDigital Akamai and LimeLight often use RTMP services for live audio streaming Server address Enter the server address and port number where the address and port are separated by a colon character For example if the address is 192 168 1 23 and the port is 1935 you would enter 192 168 1 23 1935 in the address field Use Authentication If RTMP server needs authentication set this field to yes The fields for stream username and stream password will appear automatically z E zu a urce o 5 SS AA gt m E at zen qe ee E ProSTREAM LoFi 44 Section 4 Stream user name If RTMP authentication is selected enter the server username Stream password If RTMP authentication is selected enter the server password Publish path Enter the stream publish path Usually this will be the RTMP application name used to receive the stream e g live is the default RTMP application for Adobe Flash Media Server Stream name Enter the RTMP stream name RTMP stream can also be written with multiple paths e g path1 path2 livestream Note RTMP streams require 44100 Hz sample rate to be used
62. trates are reduced so is the audio bandwidth ProSTREAM contains a selectable low pass filter in the output section Reducing the audio bandwidth by using a lower frequency setting can help reduce the audible side effects of low bitrate coding Additionally reducing the High band MIX setting can help Also operating the HF Band in the slow release time will reduce HF density which improves intelligibility as the encoder masking algorithm is not loaded as heavily with HF content OMNIA PROCESSING 61 Managing Presets From the Omnia Processing menu click Manage Presets to open the preset management window In the example on the next page we made some changes to the PhatOne preset and then clicked Save Now here in the Manage Presets window you will see that the PhatOne preset line has an additional choice Restore If we were to click on Restore now before saving a copy the original factory PhatOne preset will be restored and the changes we made would be lost So if you do make some changes to a preset and save them it would be a good idea to click Copy to save the preset with your changes to a new name This will create a user preset with that name Once that is done you can Restore the factory preset and can compare it to the new user preset that contains the changes you made from the original Note that the Restore option will only appear when you save custom changes to a factory preset or delete a factory p
63. uct and those listed in the operating instructions must be adhered to Follow All Instructions All operating and product usage instructions must be followed Heat This product must be situated away from any heat sources such as radiators heat registers stoves or other products including power amplifiers that produce heat Water and Moisture Do not use this product near water Attachments Do not use any attachments not recommended by the product manufacturer as they may cause hazards Power Sources This product must be operated from the type of power source indicated on the marking label and the installation instructions If you are not sure of the type of power supplied to your facility consult your local power company Grounding and Polarization This product is equipped with a polarized AC plug with integral safety ground pin Do not defeat the safety ground in any manner Power Cord Protection Power supply cords must be routed so that they are not likely to be walked on or pinched by items placed upon or against them Pay particular attention to the cords at AC wall plugs and convenience recepta cles and at the point where the cord plugs into the product Lightning For added protection during a lightning storm or when the unit is left unattended or unused for long periods of time unplug the unit from the AC wall outlet This will prevent damage to the product due to lightning and power surges Overloading Do not overload
64. udio processing meters and indicators ProSTREAM s audio processor is capable of performing many different processing functions at different times primarily based on dynamic range differences in the source audio The meters analyze the signals and aid in adjusting the specific parameters needed to achieve desired aural results Although the processing displays are capable of providing a wide range of information we recommended setting the audio processing based on how it sounds best to you not relying entirely on meter indications CONTROLS AND CONNECTIONS 15 IN OUT The Status bar graphs are capable of indicating more than just level information The texture and density of the audio signal can be observed based upon the dynamic action of the bar graphs and peak responding pills Of interest are the pills at the end of the input and output meters which indicate peak level The bar section represents the RMS average of the signal Wide dynamic range will display a separation between the pills and the bar whereas signal with little peak information will cause the pills to ride on the crest of the bar graph The bar graphs can indicate up to 25 dB of gain reduction Note The input and output levels are displayed relative to OdB full scale OdBfs The 0 indicator on the input output bar graphs means that every available bit of signal level is being used at that time and that there is nothing more in the level department except to create
65. xperts Group MPEG compression codecs from Fraunhofer IIS http www iis fraunhofer de en bf amm produkte audiocodec and includes the codecs as a source component of ProSTREAM Lossless encoding like a ZIP or DMG file on a computer allow an end user to un compress the data and restore all of the original information In order to gain much greater compression ratios audio compression employs lossy compression or encoding by making certain assumptions about human hearing For instance a C note played by a guitar at 85 db of power overpowers a C harmonic of a keyboard at 30 db of power so the 30db signal is minimized or tossed Lossy compression relies upon subjective process thus there are many techniques to digitally compress audio and there are many more opinions as to which are best In anticipation of the need for compression algorithms the Motion Picture Experts Group MPEG http mpeg chiariglione org was formed by the International Standards Organization ISO http www iso org and the International Electromechanical Commission IEC http www iec ch to address the needs of digital compression Their research has yielded the codecs licensed and used by ProSTREAM PROSTREAM CONFIGURATION 25 Compression Codec It is generally accepted that AAC performs better and is the codec of choice It is rare to find clients which are MP3 only a decade after the AAC codecs became standard but they do still exist MP3 was released in 19

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