[alsa-devel] Surround and SPDIF on STAC9277

Jon Smirl jonsmirl at gmail.com
Sat May 24 23:02:21 CEST 2008

I've figure out that the answer that I'm looking for is AC3 over SPDIF
support. Now I'm trying to figure out how to make it work in pulse.

On 5/24/08, Jon Smirl <jonsmirl at gmail.com> wrote:
> How are you supposed to get 5.1 audio out of your PC? When I hook the
>  SPDIF device from my STAC9227/HDA audio up to pulse, pulse says that
>  the SPDIF channel only supports stereo.
>  So I go digging around the in STAC9227 datasheet.
>  http://www.idt.com/?genID=STAC9227
>  STAC9227 codec only supports 192Khz SPDIF with 4/1*48Khz channels. It
>  doesn't support 384Khz with 8/1*48Khz channels.
>  So there are two problems, first the existing Intel HDA/STAC9227
>  driver is not exposing the 4 channel SPDIF support. Or I can't figure
>  out how to get to it.
>  Second, the hardware doesn't seem to support any way to get digital
>  5.1 audio out of the codec and into my Sony amp. STAC9227 does have
>  six channel analog out, but my Sony amp doesn't have 6 channel analog
>  in. Sony amp supports 384Khz 8-channel SPDIF in.
>  --
>  Jon Smirl
>  jonsmirl at gmail.com

Jon Smirl
jonsmirl at gmail.com

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