On 5/26/08, Takashi Iwai <tiwai@xxxxxxx> wrote: > 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. mesilliac has got it to work. There are instructions here using the a52 plugin. http://ubuntuforums.org/showthread.php?p=4451132 I'm running it right now on Ubuntu 64b. Flash works. It has some issues: sound from VLC is broken up mplayer works when it uses surround51 but not with AC3 pass-through my stereo music is getting copied to all six channels which messes up the processing the amp. Getting this to work simply and reliably would be a nice feature. I suspect most people who run SPDIF to their stereo don't realize that they are only getting a stereo signal and they need to use something like a52. > > > Takashi > > > > > On 5/24/08, Jon Smirl <jonsmirl@xxxxxxxxx> 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@xxxxxxxxx > > > > > > > > > -- > > Jon Smirl > > jonsmirl@xxxxxxxxx > > > _______________________________________________ > > Alsa-devel mailing list > > Alsa-devel@xxxxxxxxxxxxxxxx > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > > -- Jon Smirl jonsmirl@xxxxxxxxx _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
