[pulseaudio-discuss] Emulate Alsa A52 plugin in pulseaudio ?

Lennart Poettering lennart at poettering.net
Tue Mar 25 18:56:56 PDT 2008

On Fri, 29.02.08 11:22, Jim Duda (jim at duda.tzo.com) wrote:

> >> If I used anything besides nothing or channels=2, I don't get any audio.
> >
> > Here I'm a bit confused - what do you give that parameter
> > to? I thought you were talking about module-detect, but it
> > doesn't accept that parameter.
> load-module module-alsa-sink sink_name=ac3_raw device=spdif:0 channels=6
> The parameter for alsa-sink.  Changing the channels has no effect
> with spdif, however, any value != 6 for surround51 results in no
> audio.  I'm not sure this is important, just reporting the behavior
> I see.

spdif cannot do uncompressed PCM for more than two channels. Only
AC3-via-SPDIF can do 5.1. However, PA right now does not support
AC3-pass-through. You have to bypass PA for doing this for now.

surround51:0 should be opened exclusively with channels=6. Nothing
else makes any sense.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
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