User Manual - Alto Professional
Contents
1. SLEEVE Q SLEEVE INSERT RETURN SEND EFFECTS device Frequency Response Distortion Input Level Max Output Level Max 6 TECHNICAL SPECIFICATIONS Line In To Main Out MIC gt INS Send Line gt INS Send Main Out BAL Recording Out Main Out BAL 10kHz 50 kHz 0 2dB lt 0 01 30dBu 30dB Gain lt 0 01 0dB Unity 100dBu gt 100dBu 11 7dBu 22 7dBu 22dBu Main Out UNBAL 22dBu Recording 22dBu Insert Send 22dBu Digital Sampling Rates 44 1k 48k 88 2k 96k 132 3k 144k Output 24 bit Power Supply Mains Voltage U S Canada 120V 60Hz U K Australia 240V 50Hz Europe 230V 50Hz General Export Model 95 120V 200 245V 50 60Hz Power Connector 20W MAX Fuse 100 120V 500mA 200 240V 315mA Physical Dimensions 1 3 4 44 5mm x 19 482 6mm x 8 1 2 217mm Net weight Shipping Weight Approx 3 3kg Approx 4 1kg 7 BLOCK DIAGRAM NDJ TOM LNO AIAd S LOO IVLIDOIG 100 NIVO as sacl i dINV dudle INIT AOV INIA dSVHd rx L02 MO o dNV dude DIN 5 NHS INVIDVICI2. t c 8 WARRANTY 1 WARRANTY REGISTRATION CARD To obtain Warranty Service the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status so as to purport a more effective and efficient after sales warranty service Please fill out all the information carefully and genuinely miswriting or absence of this card will void your warranty service 2 RETURN NOTICE 2 1 In case of return for any warranty service please make sure that the product is well packed in its original shipping carton and it can protect your unit from any other extra damage 2 2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine and give detail information about your return address and contact telephone number 2 3 A brief description of the defect will be appreciated 2 4 Please prepay all the costs involved in the return shipping handling and insurance 3 TERMS AND CONDITIONS 3 1 ALTO warrants that this product will be free from any defects in materials and or workmanship for a period of 1 year from the purchase date if you have completed the Warranty Registration Card in time 3 2 The warranty service is only available to the original consumer who purchased this product directly from the retail dealer and
3. without prior notice Any photocopy translation or reproduction of part of this manual without written permission is forbidden Copyright 2005 SEIKAKU GROUP NF02327 1 0
4. cabling power cord Failure to do so could result in shock death or fire If in doubt seek advice from a registered electrician Do Not Remove Any Covers Within the product are areas where high voltages may present To reduce the risk of electric shock do not remove any covers unless the AC mains power cord is removed Covers should be removed by qualified service personnel only No user serviceable parts inside Fuse To prevent fire and damage to the product use only the recommended fuse type as indicated in this manual Do not short circuit the fuse holder Before replacing the fuse make sure that the product is OFF and disconnected from the AC outlet Protective Ground Before turning the product ON make sure that it is connected to Ground This is to prevent the risk of electric shock Never cut internal or external Ground wires Likewise never remove Ground wiring from the Protective Ground Terminal Operating Conditions Always install in accordance with the manufacturer s instructions To avoid the risk of electric shock and damage do not subject this product to any liquid rain or moisture Do not use this product when in close proximity to water Do not install this product near any direct heat source Do not block areas of ventilation Failure to do so could result in fire Keep product away from naked flames IMPORTANT SAFETY INSTRUCTIONS Read these instructions Follow all instructions Keep
5. it can not be transferred 3 3 During the warranty service ALTO may repair or replace this product at its own option at no charge to you for parts or for labor in accordance with the right side of this limited warranty 3 4 This warranty does not apply to the damages to this product that occurred as the following conditions Instead of operating in accordance with the user s manual thoroughly any abuse or misuse of this product Normal tear and wear The product has been altered or modified in any way Damage which may have been caused either directly or indirectly by another product force etc Abnormal service or repairing by anyone other than the qualified personnel or technician And in such cases all the expenses will be charged to the buyer 3 5 In no event shall ALTO be liable for any incidental or consequential damages Some states do not allow the exclu sion or limitation of incidental or consequential damages so the above exclusion or limitation may not apply to you 3 6 This warranty gives you the specific rights and these rights are compatible with the state laws you may also have other statutory rights that may vary from state to state SEIKAKU TECHNICAL GROUP LIMITED No 1 Lane 17 Sec 2 Han Shi West Road Taichung 40151 Taiwan http www altoproaudio com Tel 886 4 22313737 email alto altoproaudio com Fax 886 4 22346757 All rights reserved to ALTO All features and content might be changed
6. please refer to the following description 1 POWER Switch Turn the apparatus ON or OFF 3 1 1 INPUT Section INPUT LEVEL dB qa 42 0 12 CLP TE PHANTOM Low 2 PHANTOM Switch Engage this button will provide the standard 48V DC power for most condenser microphones Note Plug in the microphone well before turning phantom power on 3 LINE Switch This switch determines the type of input signal up for MIC input down for LINE input 4 GAIN Control Through this control you can adjust the input level When the LINE switch is engaged the input signal can be varied from 12dB to 12dB otherwise the input signal can be varied from 10dB to 60cB 5 INPUT LEVEL Meter The 4 segments LED will read the actual input level The CLIP LED will light up when clipping distortion occurs in the circuit 6 FREQUENCY Control This control is used to select the frequency for low cut filter from 15Hz to 360Hz based on which the fre quency below selected frequency will be cut off 7 PHASE Switch This button will reverse the phase of the corresponding frequency output by 180 so that the frequencies cancellation in some fields can be compensated for 8 LOW CUT Switch Engage this button to add a low cut filter in the signal path with a 18dB Octave You can use this function to reduce hum and stage rumble when using microphones 3 1 2 TUBE EMULATION Section GAIN REDUCTION dB OUTPUT LEVEL dB 30252015106 3 1 24 18
7. 12 6 0 6 12 18 e 0 100 E 20 4 20 VINTAGE u THRESHOLD TUBE EMULATION COMPRESSOR 9 VINTAGE Control This pot can be used to select the amount of boost 0 100 applied to the even harmonic series of the signal Being amplified by the unit The effect of manipulating the harmonic distortion is of increasing or decreasing the apparent warmth of the signal This capability is derived from the transformer and its dual servo gain stage 3 1 3 COMPRESSOR Section 10 BYPASS ACTIVE Switch Pressing this switch the compressor will be active While release this switch the Compressor is turned off It can be used to make an A B comparison between the processed and the unprocessed signal 11 THRESHOLD Control Via this control you can set the threshold of the compressor from 40 to 20dBu When the level of audio signal is higher than the set threshold Hard knee compression will be applied once the audio signal level is 10dB more than the set threshold the SKC Smart Knee Control will be applied to the audio signal 5 12 13 14 15 16 17 18 SMART Switch Lovable function through this button the hard knee mode will be converted into SKC mode If you want to get a very musical compression and you wish to get the most inaudible compression use SKC RATIO Control itis input signal to output signal ratio That is to say how the signal exceeding the threshold has t
8. User s Manual MIC PREAMPLIFIER VOICE plus D WITH DIGITAL OUT a LTO www altoproaudio com Version 1 0 August 2005 English SAFETY RELATED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol wherever used alerts you to the pre sence of un insulated and dangerous voltages with in the product enclosure These are voltages that may be sufficient to constitute the risk of electric shock or death This symbol wherever used alerts you to impo rtant operating and maintenance instructions Please read AC mains Alternating Current Protective Ground Terminal rw 1 Hazardous Live Terminal ON Denotes the product is turned on OFF Denotes the product is turned off WARNING Describes precautions that should be observed to prevent the possibility of death or injury to the user CAUTION Describes precautions that should be observed to prevent damage to the product Disposing of this product should not be placed in municipal waste and should be collection WARNING Power Supply Ensure that the mains source voltage AC outlet matches the voltage rating of the product Failure to do so could result in damage to the product and possibly the user Unplug the product before electrical storms occur and when unused for long periods of time to reduce the risk of electric shock or fire External Connection Always use proper ready made insulated mains
9. e balanced XLR connector or 1 4 TRS phone jack 34 RECORDING The XLR connector is used to output the signal to hard disk recording system for recording 35 SEND Through this unbalanced 1 4 jack the audio signal can be routed to an external effects devices 36 RETURN The return signal from an external effect device will be processed through this 1 4 jack 37 Audio INPUT These connectors are used to input the signal source You can input the signal via the balanced 1 4 TRS phone jack or XLR connector 38 DIGITAL OUT The connector provides 24 bit digital output This connector is a professional interface for transmitting digital audio signal 39 Sample Rate Selector The unit is provided with 6 different sample rates 44 1k 88 2k 96k 132 3k 144k When you connect WORD CLOCK IN connector for exterior clock please select 6 EXT or 7 EXT 40 WORD CLOCK IN The exterior clock signal can be input from the BNC connector The clock in scans the incoming information and automatically synchs to the necessary sample rate 4 INSTALLATION AND CONNECTION 4 1 Mains Connection VOICE plus D is provided with dual voltage plug You mustcheck the power supply voltage available in your country before connecting the power cord in the wall outlet 4 2 Audio Connection The VOICE plus D Mic Preamplifier Voice Processor is equipped with balanced XLR connectors as well as 1 4 phone jack and can be connected with other units in differ
10. ent ways to support a vast range of applications without experiencing a signal loss a Wiring Configuration Both types of connectors available on VOICE plus D can be wired in balanced and unbalanced modes Please see following drawing for details For 1 4 Phone jack Lp Fa Ring Tip Ring Tip Sleeve Sleeve TS Type Unbalanced TRS Type Balanced TRS Type Unbalanced e For XLR connector Pin2 Pin3 Linked to Pin1 manually jJ XLR Type Unbalanced XLR Type Balanced b In Line Connection Please see following drawing for details Balanced TIP RING SLEEVE Sleeve Cie fue JO 5 g i 3 Unbalanced 7 1 ume JC RING SLEEVE Sleeve 7 2 0 pme A SLEEVE 1 Cente 2 3 Screen 10 Sleeve OM Sleeve 0 10 Ring ing TIP RING SLEEVE SLEEVE RINGTIP Sleeve 1 7 fes Tip Cente ZY Si Sleeve screen TIP SLEEVE 0 00 Centre Ring Sleeve Screen 1 1 2 2 3 3 c Insert Points Connection In case you are using the main inserts of your mixing console and you have a single jack for SEND and RETURN you can use an insert Y cable Please see following drawing 1 4 TRS insert Send Return _ Gnd Screen Ring Tip Sleeve e I
11. ied from to 10dB 30 OUTPUT LEVEL Meter It will read the actual output level The range goes from 12dB to 12dB The CLIP LED will light up when clipping distortion occurs in the circuit 3 2 Rear Panel 31 FUSE Holder Voltage Selector This is a dual voltage unit Before you attempt to connect and operate the unit please make sure that your local voltage matches the voltage on the fuse holder cover Caution The fuse protecting the AC supplies circuits of this unit The fuse can only be changed by a qualified technician in the event of a fault or changing the supply voltage If the fuse continues to blow after replacing discontinue use of this unit before repaired THIS IS SET FOR THIS IS SET FOR 110V AC TO 120V 220V AC TO 240V AC OPERATION AC OPERATION The fuse holder above the AC connector on the rear of the chassis has 3 triangular markers please refer to the above pictures with two of these triangles opposing each other your unit is set to the operating voltage printed next to these markers To change pull fuse holder out and rotate 180 then push in again 32 AC Inlet This connector is meant for the connection of the supplied main cord Do not insert power cord into unit until voltage has been correctly set Do not plug power cord into AC power until voltage has been correctly set 33 MAIN OUTPUT These connectors are used to output the signal You can output the signal via th
12. in control it can compensate the gain for external unit connected to VOICE has no input gain control Besides through the low cut function you can reduce hum and stage rumble when using microphones If you sing into your microphone more gently in a soft passage the level of the signal generated by your voice will get much closer the floor noise level and such floor noise will become disturbing In order to kill this problem expander gate are used Either more or less the work done by expander gate is similar to compressor it s used to eliminate hiss or hum from a stage amplifier crosstalk in a system or any other kind of background The compressor is used to smooth out dynamic changes create a more consistent volume throughout the pro gram materials It has two main parameters threshold and ratio Generally speaking lower ratios are best for vocals and acoustic guitars higher ratios tame the errant drum hit In fact the EQ function is corrective device which is used to remove unwanted frequencies or compensate for imperfect microphone response curves etc Adjust the output volume control to get the proper gain we will introduce the common wiring configuration about VOICE plus D in a system Please reserve your time to well understand the application example so as to be able to fully exploit the VOLICE plus and its versatile features Hard disk recording system MIC or other program materials DAT Recorder
13. nsert Leads SLEEVE RINGTIP 1 C a mme cot fes S urhe Vv 4 3 Rack Mounting Tip Qe 9 Q re se Ring Sleeve Sleeve O S Sleeve 1 2 Send Tip 3 Ring i Sleeve 2 Return 3 Ti O Centre Send Ring Screen Sleeve Centre Return Screen The most secure mounting is on a universal rack shelf available from various rack manufactures or your music dealer The VOICE plus D Mic Preamplifier Voice Processor fits into one standard 19 rack unit of space Please allow at least an additional 4 depth for the connectors on the rear panel Be sure that there is enough air space around the unit for sufficient ventilation and please do not place the VOICE plus D on high temperature devices such as power amplifiers etc to avoid overheating 5 APP LICATION When use the VOICE plus D mic pre amplifier voice processor in a complex recording or PA system the instrument or voices to be recorded or processed are directly connected to the INPUT connector of this apparatus Polish the program materials depend on adjusting each function The further details please refer to the following description Here Depending on the LINE switch to select the input signal types releasing button for MIC input signal or engaging button for LINE input signal In order to achieve the proper gain before noise don t ignore the input ga
14. o be reduced It can be varied from 1 1 to 1 When the ratio is 1 1 the signal hasn t been compressed at all And the signal will be over compressed with high compression rate which results in much loss in dynamic range GAIN REDUCTION Meter It indicates the gain reduction The rangeis from 1 dB to 30dB OUTPUT GAIN Control Via this control you can vary the output signal by a maximum of 20dB In this way you can recover a level that had been lost because of the compression process OUTPUT LEVEL Meter It reads the actual output level The range goes form 244 to 18dB THRESHOLD Control Trough this control you can set the threshold of the limiter The unit will activate the limiter when the signal exceeds the threshold for more than 20dB when the signal is below threshold again reduction goes back to 04 and in this case input and output signals are again identical LIM LED The LED lights up when the limiter is engaged 3 1 4 VOICE OPTIMIZED EQ Section 19 20 21 ABSENCE EN JEN EE cR WARMTH VOICE OPTIMIZED EG BYPASS ACTIVE Switch Engaging this button is equal to adding the optimized EQ to signal path oppositely releasing the button will allow you turn off the Optimized EQ function BREATHE Control Through rotating this control you can boost or attenuate the treble range by 8dB You can use it to get rid of high frequency noises or to boost the high harmonics of the human voice PRESENCE C
15. ontrol Rotate this control to boost or attenuate those frequencies around 1 2kHz from 12dB to 8dB which can affect most fundamental frequencies of human voice It will give you a very wide panorama of sound effe cts 22 WARMTH Control Rotate this control to boost or attenuate the signal level of selected frequency from 12dB to 8dB 23 TUNING Control Adjust this control to select the right frequency you wish to polish the adjustable range is from 130Hz to 720Hz 24 ABSENCE Switch Engaging this button will give you up to 4dB cut at 4kHz It is used to reduce the unwanted noise in this band 3 1 5 DE ESSER Section B 1 2K7 12K o CUT FREQUENCY dB DE ESSER BYPASS 25 BYPASS ACTIVE Switch Engaging this button is equal to adding the De esser function to signal path oppositely releasing the button will allow you turn off the function 12dB to 8dB 26 CUT FREQUENCY Control Rotate this control to select the frequency that you want to cut off the adjustable range is from 2k7 to 12kHz 27 THRESHOLD Control Rotate this control to set the threshold of De esser from 204 to 5dB It s used to eliminate the hiss and unnecessary vocal caused by approaching MIC too nearest 28 ACTIVE LED It will light up when the De esser is on 3 1 6 MASTER VOL Section OUTPUT LEVEL dB 12 12 CLIP 29 MASTER VOL Control Rotate this control to attenuate or boost the output level which can be var
16. roadcast and television studios The VOICE plus D meets the highest and non compromise requirements in terms of operation sound specifications and workmanship The VOICE plus D provides you a more natural and musical sound eliminating interference signals smoothing out the overall signal dynamics compensating deficiencies in the sound image and removing unwanted frequencies etc he switchable 48V Phantom Power supply allows you to operate condenser microphone more conveniently It also includes a sophisticated 24 bit digital output interface with SPDIF connector for transmitting digital audio signal We believe the VOICE plus D is your perfect choice for enhancing the performance of any console or digital audio workstation 2 FEATURE LIST Mountable in one standard 19 rack unit e Providing 48V phantom power for MIC input stage Smart compressor for precision limiting signal peaks and dynamic processing e Voice optimized EQ is responsible for voice reinforcement De essor for eliminating the hiss and unnecessary vocal High quality parts and rigid configuration for long life and full credibility 3 CONTROL ELEMENTS 3 1 The Front Panel VOICE plus D Your VOICE plus D provides with convenient operation interface and excellent performance You can easily find the six sections from the interface input section Tube Emulation Compressor section Voice optimized EQ section De esser section and Master Vol Section For more detains
17. these instructions Do not discard Heed all warnings Only use attachments accessories specified by the manufacturer Power Cord and Plug Do not tamper with the power cord or plug These are designed for your safety Do not remove Ground connections If the plug does not fit your AC outlet seek advice from a qualified electrician Protect the power cord and plug from any physical stress to avoid risk of electric shock Do not place heavy objects on the power cord This could cause electric shock or fire Cleaning When required either blow off dust from the product or use a dry cloth Do not use any solvents such as Benzol or Alcohol For safety keep product clean and free from dust Servicing Refer all servicing to qualified service personnel only Do not perform any servicing other than those instruc tions contained within the User s Manual PREFACE Dear Customer Thanks for choosing VOICE plus D MIC PREAMPLIFIER VOICE PROCESSOR WITH DIGITAL OUTS and thanks for choosing one of the results of ALTO AUDIO TEAM job and researches For our ALTOAUDIO TEAM music and sound are more than a job are first of all passion and let us say our obsession We have been designing professional audio products for a long time in cooperation with some of the major brands in the world in the audio field The ALTO line presents unparalleled analogue and digital products made by Musicians for Musicians in our R amp D Centres in Ital
18. ustomers It is their passion for music and professional audio that has made it possible for us to offer you our most important team member our continued support Thank you very much ALTO AUDIO TEAM TABLE OF CONTENTS 1 2 ec IC FEATURE LIST ended iere ce toe tenet cater ca ee ase CONTROL e ER nete e Ce Eon cnt a px tino 3 1 The Front Panel 3 1 1 INPUT Section 3 1 2 EXPANDER GATE amp COMPRESSOR Section 3 1 3 VOICE OPTIMIZED EQ Section 3 1 4 DE ESSER Section 3 1 5 MASTER VOL Section 3 2 The Rear Panel INSTALLATION AND CONNECTION ssseeemmmIIHe 4 1 Mains Connection 4 2 Audio Connection 4 3 Rack Mounting APPLICATION reote Cete eoi intu e ce pet pes beh date TECHNICAL SPECIFICATIONS BLOCK DIAGRAM aiee eiai atur niue xixe qoc aUo sins rela elei eir eda uude Mul nis ggf 1 INTRODUCTION Thank you very much for expressing your confidence in ALTO products by purchasing our VOICE plus D MIC Preamplifier Voice Processor with digital outs With the VOICE plus D you will acquire an extremely useful MIC Preamplifier Voice Processor which is based on many years of experience and findings in amplifier and processor technology and is used throughout the world in renowned studios sound reinforcement systems as well as in b
19. y Netherlands United Kingdom and Taiwan The core of our digital audio products is a sophisticated DSP Digital sound processor and a large range of state of the art algorithms which have been developed by our Software Team for the last few years Because we are convinced you are the most important member of ALTO AUDIO TEAM and the one confirming the quality of our job we like to share with you our work and our dreams paying attention to your suggestions and your comments Following this idea we create our products and we will create the new ones From our side we guarantee you and we will guarantee you also in future the best quality the best fruits of our continuous researches and the best prices Our VOICE plus D is the result of many hours of listening and tests involving common people area experts musicians and technicians The result of this effort is that you can acquire an extremely efficient and universal dynami cs processor It contains several circuit designs which make the unit an ultimate dynamic processor INPUT TUBE EMULATION COMPRESSOR VOICE OPTIMIZED EQ DE ESSER and MASTER VOL which can guarantee to acquire the optimized sound Nothing else to add but we would like to thank all the people that made the VOICE plus D a reality available to our customers and thank our designers and all the A LTO staff people who make possible the realization of products containing our idea of music and sound and are ready to support you our c
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