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Subject:MultiChannel with USB
Posted by: yprigent
Date:11/19/2002 12:49:10 PM

I have an external USB A/V audio card (Yamaha RP-U200), it can be used in 2, 4 or 6 channels mode.
It works pretty well with multi channel wave format under Windows Millenium, using standard Microsoft drivers (and also with DTS and AC3).
But I do not find the way to use more than two channels with Acid, is there a way to use 6 channels with this kind of sound card, or is this the same issue that arise with Sound Blaster 5.1 with Creative drivers ? The USB drivers does not present specific output for front/rear and center/subwoofer to the OS.
Thanks.


Subject:RE: MultiChannel with USB
Reply by: Iacobus
Date:11/20/2002 2:21:21 PM

Try here for your answer.

HTH,
Iacobus

Subject:RE: MultiChannel with USB
Reply by: yprigent
Date:11/20/2002 3:28:36 PM

Thank you,
I know that it is not possible to output directly 6 channels unless it is encoded in DD or DTS via a single digital cable (SPDIF) to a decoder.
But since the Microsoft USB audio drivers used by the Yamaha card are able to play multichannel wave files (uncompressed) via the USB cable, I was wondering if there was a way to use the Yamaha card for this purpose (6 discrete channels output).
Well, I also see that Acid seems to be unable to load mutichannel wave format files as describe here :
http://www.microsoft.com/hwdev/tech/audio/multichaud.asp
so I think it may not be possible to do this in current release of Acid.

Subject:RE: MultiChannel with USB
Reply by: pwppch
Date:11/20/2002 9:25:48 PM

ACID does not support DirectSound audio i/o. This is basically the only consitent way to support wave format extensible audio i/o as decribed in the MS mutlcichaud site.

We are working on a solution for this.

Peter

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