Can't Capture ac3 with Audigy Platinum?

[mb571]

I have a ati aiw 8500 dv and an audigy platinum. When trying to capture from dolby digital sattelite reciever with Windvd recorder the ac3 audio doesn't capture correctly. I have Windvd recorder set to capture 8000 kb/s mpg2 DVD compliant 720X480 with ac3 checked at 48 khz but unsure of bit rate. Captures video ok but audio just screams out of my speakers. I have optical spdif cable connected from sattelite reciever to audigy platinum card. Is ther a problem compressing to mpeg2 on the fly with ac3 audio?

[fluxcapacitor]

Best advice I can give is to post in the forums at 3DSoundSurge

[Manokat]

Not sure what OS do you use and what ac3 direct show filter you use, but what happened is your application that you use to playback the audio treats the file like a regular wav file intead of ac3. If you have an external receiver, connect the spdif from audigy to the reciver and enable AC3 passthrough from Audigy mixer. Or install ac3 filter so that you can playback digital audio ac3 to analog speakers (computer speakers).

If you are using XP and the latest driver for audigy you should be able to play the ac3 file with Media Player or Creative Player without ac3 filter. But you have to enable software decode in your audigy Mixer.

Another thing is that you can not capture to ac3 from ac3 stream using audigy IMO, unless you use APS driver. You can however capture from analog two channel to ac3 (stereo or multichannel).`The ac3 stream that is coming from your sattelite will be down sampled to two channel before WinDVD recorder use for encoding to ac3. So it is not ac3 bit-per-bit copy.

[Nelson37]

SFAIK, you CAN cap AC-3 direct IF you have the emu10k-2 chip, NOT the -1 version. Then you need some third-party drivers and must run the resulting file through BeSplice as a DDR WAV, I think.

Do a Search on my name and AC-3, I forget the name of the drivers and the exact syntax. Latest post or two has some info from two or three people confirming success. I do not yet have the required hardware, so cannot confirm personally.

Dunno if direct-to-AC-3 can work, apparently the file is truly digital but interleaved with empty data for timing purposes, you must cap as a WAV and then process thru BeSplice to remove the gaps. You will hear the original cap as pulsing static.

Just for grins I bought a Philips 705 solely for the digital input and got as far as the pulsing static. Card was not 24-bit but MIGHT have worked, I'll never know as it died the same week I got the BeSpliced info. Back to old SB Live.

I think WinDVD is expecting standard Analog Audio as input and ENCODING to AC-3, not to CAP an incoming AC-3. Though I am not certain of this.