POAB - optiCompo electronics
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1. In most cases you have to remove the card to reach the used connectors 4 POAB optical S PDIF adapter User Manual eE i n y e s r i a E jA ETE FF STR VE GUL UC MLE SB Audigy Live Player 1024 Value 40 pin Old SB Live Value with 12pin connector q During the re installation of the sound card you should take care that there is some space left between the multi adapter and the next PCI AGP card Although the adapter s back is coated with insulating material you should not risk a short circuit 4 Plug the 14 pin connector of the module cable to the port of your POAB to SB Audigy Live via module cable OUT optical digital signal TOSlink J 5 Choose a free slot to install the POAB module Remove the slot cover and screw the POAB tight in it s place If possible the POAB slot should be installed with a little distance to high speed e AGP or PCI cards which may cause interferences 6 Check for tight screws and a tight fit of the SB Audigy Live close the casing and switch on the computer POAB optical S PDIF adapter User Manual gt After switching on the computer there will be an immediate signal on SPDIF OUT The easiest way to check this is to controll whether the optical output emitts red light remove the protective cap This means the hardware is installed correctly bravo If the optical output does not emit light after power on switch off the computer2. e immediately and check the cable connections inside the computer casing once more Optical Signal Connections Take a TOS ink or TOS ink to Miniplug cable TOSlink cables are offered in nearly arbitrary lengths in most audio shop We recommend to limit the length to 10m and to avoid sharp bendings of the cable Otherwise the cable loses may prevent an error free transmission There are mainly two different types of optical plugs e ODT TOS ink plug used by HiFi devices MD and DAT recorders POAB e 3 5mm 1 8 inch optical miniplug used by portable MD and DAT recorders Examples POAB MD DAT Player Amplifier DAC S AC 3 decoder ee 2 i seal na rear side TOSHink TOS iink cable O r portable CD player MD or DAT recorder 3 5 mm opti jack optical miniplug TOS ink TOS iink cable amp TOSfink gt miniplug adapter TOSlink miniplug cable MD DAT Player Amplifier DAC AC 3 decoder rear side TOS ink TOS iink cable Please use the protective caps for the optical interfaces when they are not in use This prevents dust scratches etc which lower the signal quality 6 POAB optical S PDIF adapter User Manual software Setup Windows 9x ME 2000 XP Mixer Settings Start the Creative mixer It should look similar to our screenshot e You will find an SPDIF IN controller i MIXER F Ps The adjustment of the recording le
3. POAB Optical S PDIF Adapter for SB Audigy Live 1024 Player Value User Manual http www opticompo com info opticompo com 2 15 1999 Ver 1 0 3 3 2000 Ver 1 1 08 20 2003 Ver2 0 2 POAB optical S PDIF adapter User Manual Thank you for purchasing optiCompo s POAB nice Priced Optical AdapterBoard Please read the following installation procedure carefully and you will enjoy a wide variety of optical recording options with your sound card Some features your POAB has to offer Interconnectivity Using the POAB you are finally able to connect your optical S PDIF audio devices to your PC using the SoundBlaster Audigy or Live Independence You can interconnect analog and optical S PDIF audio devices via the POAB SoundBlaster Audigy Live combination Service If you have problems with your POAB please check our homepage for usefull hints and solutions http www opticompo com Before contacting optiCompo try to solve the problem by reading this User Manual or the manuals and help files for the other used devices and software If these manuals leave any questions we provide e mail support at audiosupport opticompo com So than Just enjoy the digital world of music Your optiCompo team Warning Do not eat or pulverize any of the components of the POAB because some components contain toxic material We are not liable for any damages caused by improper use of the POAB or it s componen
4. r Live can serve as the master 48 kHz clock for the sound source as provided for in the newest operating system then the source need not be converted But any external source can t possibly know our EXACT 48 kHz rate and so its sample rate must be normalized to ours even if the deviation is very small This is a fact of digital mixing Once again those most familiar with practices in older digital studios will ask why we didn t make accommodations for supply and receiving AES black synchronization information to eliminate the necessity of sample rate conversion The reason is that studio synch is simply too complex an issue for most consumers to grasp sample rate conversion at least by E mu sounds great and makes the digital patch cord behave just like an analog one 8 POAB optical S PDIF adapter User Manual Specifications supply current operating voltage operating temperature optical in out sample rate in sample rate out approx 50mA 5V supplied by SB Audigy Live approx 5 C 60 C TOS ink 670nm 2 05 MBit s 32 kHz e g DSR 2 82 MBit s 44 1 kHz e g CD 3 07 MBit s 48 kHz e g DAT 3 07 MBit s 48 kHz e g DAT
5. r things mixing of all the various functions in the digital domain To mix digital audio signals they must all be at EXACTLY the same sample rate even deviations of a few parts per million must be eliminated So when we went to design the EMU10K1 we had to choose a single master sample rate at which the mixer would operate and of course we had to design sample rate converters to change any incoming audio to match this sample rate This is the technology required to achieve digital mixing that s why it s first featured by Sound Blaster Live It was obvious that either 44 1 kHz the CD standard or 48 kHz the professional audio and DVD standard were the only possible choices for the master sample rate We picked 48 kHz for a variety of reasons First if we were processing incoming audio at nominally 48 KHz use of 44 1 kHz would lose information Second even in preparation of 44 1 kHz CDs in professional studios today 48 KHz is the preferred standard with a final conversion to 44 1 KHz as the last step Third the nearly twice larger guard band the difference between 20 kHz and the Nyquist frequency of 24 kHz means virtually every audio process and effect performs much better at 48 kHz than at 44 1 kHz And finally the economical AC 97 CODEC operates at 48 KHz The SPDIF outputs provide the exact EMU10K1 effects engine outputs so they operate at this same 48 kHz rate So why didn t we add sample rate converter to each SPDIF ou
6. tput to convert the 48 kHz signal back to 44 1 kHz The primary reason is cost Since these outputs are master signals they should be treated as very high quality and as such the sample rate converters to be useful would be fairly expensive in silicon Furthermore since the EMU10K71 is clocked o the AC 97 CODEC master clock which is based on 48 kHz a separate clock and crystal would be necessary to support 44 1 kHz At least if audio quality were important since a standard phase locked loop or divider system would introduce too much jitter And since the job could be done externally fairly straightforward we felt making all users bear the cost burden of this feature for the few who would use it was a poor trade off Also we are trying to promote the uniform system design which will be found in the modern digital studio in which the digital inputs bear the burden of sample rate normalization For those few users who for some reason seem to need a 44 1 kHz SPDIF output they ll either have to purchase a sample rate converter box Analog Devices makes a 20 chip which will do the job nicely or as would tend to recommend convert their operation to 48 KHz throughout and if 44 1 kHz is needed for CD have this jobbed out at CD production like most people do Why must all the sound sources pass through the sampling rate converters It s not actually true that every sound source must pass through sample rate conversion If the Sound Blaste
7. ts kkkkkkkkkkkkkkkkkkkk Information in this manual is subject to change without notice Trademark Acknowledgement All trademarks referred herein are the property of their respective owners POAB optical S PDIF adapter User Manual Selecting the output signal source The POAB works basing on the digital signals interfaced by the SB Audigy Live Please choose the SPDIF channel to be passed to the output by setting the jumper front stereo channel LF RF signal for 2 and 4 speaker mode SPDIFO 1 center and subwoofer channel SPDIFO 2 mix of front and rear stereo channel rear stereo channel LR RR only active in 4 speaker mode SPDIFO O SPDIFO 3 Default is SPDIFO O0 Installing the POAB 1 Switch off your computer remove the power supply cable and unscrew the computer casing Make sure to avoid electrostatical chargings caused by clothes carpets etc e they can destroy electronic components 2 Locate the sound card The SBAudigy Live is a PCI card In tower casings this usually means that it is installed upside down In most cases you will have to remove the card to reach the used connectors 3 Up to now there are two supported SBAudigy Live extension pin outs The POAB s module cable has got a multi adapter for the different hardware releases SB Audigy SB live gt SBiive old VALUE The following pictures show how the small adapter is plugged to the SB Audigy Live card
8. vel is a little unusual for digital recording assume your sound signals are already digitised so the volume is fixed Nevertheless you probably will have to correct the volume at the recording mixer to make sure the signal is not overdriven e The SPDIF OUT signal should be on all the time It is equivalent to the analog line out of the SBAudigy Live Nevertheless it might be necessary to check Digital Output Only as the same resource is also used for the center speaker f MIXER Play Control Other Advanced Ce On Off Controls Please note that every adjustment e g tremble or bass adjustment has an influence on the digital line out SB Audigy Live and Sample Rate questions The Soundblaster Audigy Live Value is able to work on all popular sample rates at the input But note that every signal going into the card will be converted to internal 48 kHz refering to actual drivers So the output sample rate is fixed at 48 kHz for SB Live For SB Audigy the output sample rate can be set to 44 1 48 or 96 kHz POAB optical S PDIF adapter User Manual For SB Live the reasons have been given by a Creative scientist at the Soundblaster Live home page hittp www sblive com extract Dave Rossum Chief Scientist It s important to remember that the Sound Blaster Live is much more than just a wavetable synthesizer or a CD playback device At its heart is the EMU10K1 exects engine a powerful DSP performing among othe
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