On Thu, Feb 28, 2008 at 03:09:45PM -0500, Jim Duda wrote:
> I would like to use pulseaudio on a machine which I have the sound card
> attached to an digital decoder. I'm using the
> alsa A52 plugin to perform a stereoupmix from 2 channels to six channels such
> that I get the same stereo out of the
> front and rear speakers.
> Can I use the remap module to copy 2 channels to 4? The front speaker and
> sub woofer would be nice too.
Yes you can, but there shouldn't be need for that. Since
0.9.8 PulseAudio has supported automatic up- and downmixing,
which probably does what you want. If you have 0.9.8 and it
still doesn't work, check that you haven't disabled the
feature in daemon.conf by saying disable-remixing=yes.
If I've understood your setup correctly, you would need to
encode the output of PulseAudio to AC-3. I don't have any
experience in that field, so the following is just my best
guess how it would work:
Your new ~/.asoundrc:
pcm.!default {
type pulse
}
pcm.a52encode {
type a52
}
# What's this for?
pcm.front-spdif {
type plug
slave.pcm "iec958"
}
Comment out module-hal-detect and module-detect in
/etc/pulse/default.pa. Add this line instead:
module-load module-alsa-sink sink_name=ac3_out device=a52encode channels=6
rate=48000
--
Tanu Kaskinen
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