[alsa-devel] Surround and SPDIF on STAC9277
tiwai at suse.de
Mon May 26 16:52:08 CEST 2008
At Sat, 24 May 2008 17:02:21 -0400,
Jon Smirl wrote:
> 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.
If you think of real-time conversion to AC3 from linear PCM streams, I
guess pulseaudio doesn't support it natively.
> 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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