[mythtv-users] Audio gone 'helium'
mythtv at ml.cactii.net
Wed Jun 29 10:17:51 UTC 2005
I've been running my mythbox for some months now, using the following
- Skystar2 DVB
- CMEDIA audio out (SPDIF), alsa driver
- Nvidia MX440 Svideo out, nvidias own driver
Until a couple of days ago, everything worked brilliantly...perfect
smooth picture and crystal clear audio, for both recordings and live tv.
However, all of a sudden yesterday, both livetv and playback have been
very strange, with things seemingly shifted up a pitch and up a gear.
People sound like they're breathing helium and everything runs a
fraction faster. To my knowledge, I've not made any changes to the
system. I have determined the following.
It's _not_ time scaled...the osd shows everything running at 1.0x.
If I disable Video sync timing (i've been using opengl vsync), then
everything comes back to normal speed. So it seems to be related to
this. I want to turn my vsync timing back on though!
Normal video through mplayer (also playing the .nuv files) is perfect.
I tried two different nvidia driver versions for the X display and the
problem persists. I tried rebooting - problem persists. Tried a complete
power cycle, and the problem persists.
My refresh rate should be fine - I'm running it at 50Hz (PAL) and this
One clue is that the frontend shows 'audio buffer underrun' on the
Anyone have any ideas where I should look next?
More information about the mythtv-users