[mythtv-users] Audio issues with .21 - very quiet washed out sound

[Matt S.]

I upgraded tonight to SVN Head, made sure all the changes in .21-fixes
were applied.  Was running SVN ~15100 with no problems playing back
these videos.  Now I'm having some weird sound problems.

On some videos in my mythvideo library, the sound is very very quiet
and washed out.

Here's some lines from mythfrontend -v audio:
2008-03-08 20:54:20.544 AFD: Opened codec 0x8459bd0, id(MPEG2VIDEO) type(Video)
2008-03-08 20:54:20.544 AFD: codec MP2 has 2 channels
2008-03-08 20:54:20.544 AFD: Opened codec 0x8343590, id(MP2) type(Audio)
2008-03-08 20:54:20.544 AFD: Audio Track #1 is A/V stream #1 and has 2 channels
in the Undetermined language(7695972).
2008-03-08 20:54:20.544 AFD: Selected track 1: Undetermined MP2 2ch (A/V Stream
#1)
2008-03-08 20:54:20.544 AFD: Initializing audio parms from audio track #1
2008-03-08 20:54:20.544 AFD: Audio format changed
			from id(NONE)    -1Hz -1ch   0bps    ; id(NONE)    -1Hz
-1ch   0bps
			to   id( MP2) 44100Hz  2ch  16bps    ; id( MP2) 44100Hz
 2ch  16bps
2008-03-08 20:54:20.547 AO: Needs upmix
2008-03-08 20:54:20.547 AO: Killing AudioOutputDSP
2008-03-08 20:54:20.547 Opening audio device 'default'. ch 6(2) sr 44100
2008-03-08 20:54:20.547 Opening ALSA audio device 'default'.
2008-03-08 20:54:20.654 in SetParameters(format=2, channels=6, rate=44100, buffe
r_time=500000, period_time=125000)
2008-03-08 20:54:20.655 get_buffer_size returned 15052
2008-03-08 20:54:20.655 set_period_time_near returned 21333
2008-03-08 20:54:20.655 get_period_size returned 940
2008-03-08 20:54:20.655 AO: Audio fragment size: 6144
2008-03-08 20:54:20.656 AO: create upmixer
2008-03-08 20:54:21.411 AO: create upmixer done with surround mode 2
2008-03-08 20:54:21.411 AO: Audio Stretch Factor: 1
2008-03-08 20:54:21.411 Audio Codec Used: not set
2008-03-08 20:54:21.411 AO: Ending reconfigure
2008-03-08 20:54:21.411 AO: Needs upmix
2008-03-08 20:54:21.411 AO: no change exiting
2008-03-08 20:54:21.412 AO: kickoffOutputAudioLoop: pid = 6158
2008-03-08 20:54:21.412 AO: OutputAudioLoop: Play Event
2008-03-08 20:54:21.414 AO: Needs upmix
2008-03-08 20:54:21.415 AO: no change exiting
2008-03-08 20:54:21.415 AO: Pause 1
2008-03-08 20:54:21.417 AO: OutputAudioLoop: audio paused
2008-03-08 20:54:21.438 VideoOutputXv: XVideo Adaptor Name: 'NV17 Video Texture'
2008-03-08 20:54:21.444 WriteAudio: buffer underrun
2008-03-08 20:54:21.449 OSD Theme Dimensions W: 640 H: 480
2008-03-08 20:54:21.634 TV: Changing from None to WatchingPreRecorded
2008-03-08 20:54:21.634 AO: Pause 1
2008-03-08 20:54:21.635 AO: OutputAudioLoop: audio paused
2008-03-08 20:54:21.644 Realtime priority would require SUID as root.
Initialize Yadif Deinterlacer. In-Pixformat = 1 Out-Pixformat=1
yadifdeint: size changed from 0 x 0 -> 352 x 240
2008-03-08 20:54:21.754 OpenGLVideoSync()
2008-03-08 20:54:21.811 Video timing method: SGI OpenGL
2008-03-08 20:54:21.829 AO: Pause 0
2008-03-08 20:54:21.830 WriteAudio: buffer underrun
2008-03-08 20:54:25.074 TV: Attempting to change from WatchingPreRecorded to Non
e
2008-03-08 20:54:25.096 ~OpenGLVideoSync() -- begin
2008-03-08 20:54:25.096 ~OpenGLVideoSync() -- middle
2008-03-08 20:54:25.096 ~OpenGLVideoSync() -- end
2008-03-08 20:54:25.120 AO: Killing AudioOutputDSP
2008-03-08 20:54:25.125 AO: OutputAudioLoop: Stop Event
2008-03-08 20:54:25.125 AO: kickoffOutputAudioLoop exiting
2008-03-08 20:54:25.219 TV: Changing from WatchingPreRecorded to None


Any ideas?  Let me know if there's anything else I can provide.  I've
removed my .asoundrc file, using ALSA:Default.  Connecting to my
receiver via SPDIF.

Thanks!
Matt