[mythtv-users] Audio with 0.24

[Jean-Yves Avenard]

Hi

On Saturday, December 4, 2010, Kevin Ruml <k_ruml at yahoo.com> wrote:
> Hello,
>
> I just upgraded to 0.24 on Debian Squeeze from the debian-multimedia.org packages since they released today after having seen fairly

Surprising that they would release 0.24 packages today, yet use a 0.24
code that do not include any of the changes made in the past 1.5
months

>good reports on the user list about the upgrade, but I am having a problem with audio.  I'm using straight ALSA, not Pulse.  I did the "scan for audio devices" setup step as recommended, but my audio and video are choppy - recordings, videos, live TV, music.  I'm running a SB Live with coax spdif output to my receiver.  Audio was working fine with 0.23 including AC3 and DTS pass-through to 5.1 surround, and no kernel change with the upgrade to 0.24 that might affect ALSA.  It was pretty much only the 0.24 Myth packages installed from a working 0.23 setup.  I had an .asoundrc in place previously to handle Mythmusic outputting to 48KHz to the SB Live card since it doesn't do 44100.  I've tried without it and with it after the upgrade and no difference - still choppy audio/video.  I found this:

This alsa configuration isn't required with 0.23 or 0.24; your card
report 48kHz as the only supported rate, mythtv will automatically
resample as required.


>
>
> iec958:CARD=Live,DEV=0
>     SB Live! 5.1, Multichannel Capture/PT Playback
>     IEC958 (S/PDIF) Digital Audio Output
>
>
>
> 2010-12-03 23:40:25.482 VideoOutput: Created YV12 OSD.
> 2010-12-03 23:40:27.819 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:28.220 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:28.622 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:29.023 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:29.424 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:29.826 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:30.627 ALSA, Error: WriteAudio: buffer underrun
> 2010-12-03 23:40:30.877 TV: Attempting to change from WatchingPreRecorded to None
> 2010-12-03 23:40:30.892 AO: Killing AudioOutputDSP
> 2010-12-03 23:40:30.928 AO: OutputAudioLoop: Stop Event
> 2010-12-03 23:40:30.928 AO: kickoffOutputAudioLoop exiting
> 2010-12-03 23:40:30.979 TV: Changing from WatchingPreRecorded to None
> 2010-12-03 23:41:05.001 OpenGL: Deleting OpenGL Resources
> 2010-12-03 23:41:05.011 Deleting UPnP client...
>


Actually, I'm at loss on why it would have worked in the past with
0.23 but not 0.24.

If you are using the spdif port, your system is properly configured.

What about if you activate the up mixer so the pc will output AC3
instead; would that help?