'Twas brillig, and pl bossart at 13/07/10 21:21 did gyre and gimble:
> Adding this in /etc/asound.rc (more exactly
> /etc/alsa/pulse-default.conf on my Fedora box) work fine:
>
> pcm.a52 {
> @args [CARD]
> @args.CARD {
> type string
> }
> type rate
> slave {
> pcm {
> type a52
> bitrate 448
> channels 6
> card $CARD
> }
> rate 48000 #required somehow, otherwise nothing happens in PulseAudio
> }
> }
>
> a52:0 is detected by PulseAudio and the encoded output shows as
> 'Digital Surround 5.1 (IEC958/AC3) in pavucontrol.
>
> I just finished testing all the changes I posted yesterday. Works
> flawlessly, I can switch from 2ch PCM over SPDIF to 5.1 still over
> SPDIF but re-encoded with a52, and unlike the passthrough case I can
> mix the multichannel content with alerts or system tones.
> The only bug I found is that if I change the individual volume on one
> of the channels, there's a ringing noise introduced, and it does not
> go away unless I kill the stream.
>
> Will prepare a set of patches, Colin it'd be great if you can merge
> them in git master.
Cool :)
--
Colin Guthrie
gmane(at)colin.guthr.ie
http://colin.guthr.ie/
Day Job:
Tribalogic Limited [http://www.tribalogic.net/]
Open Source:
Mandriva Linux Contributor [http://www.mandriva.com/]
PulseAudio Hacker [http://www.pulseaudio.org/]
Trac Hacker [http://trac.edgewall.org/]
