myth tv - crackling audio

David Foster dbfoster at
Sun Oct 23 18:13:43 UTC 2005

On 10/23/05, Lee Braiden <lee_b at> wrote:
> On Sunday 23 October 2005 09:28, Gary Varnell wrote:
> > Can anyone tell me how to keep my audio from crackling when using
> mythtv?
> > I have tried everything I can think of. When listening to the realtime
> > unbuffered audio it sounds great, although obviously it is out of synch
> > with the buffered video. When I listen to the buffered audio it sound
> > horrible regardless of the audio record settings.
> >
> > I have opened up every possible audio channel for both my sound card
> (sound
> > blaster live) and my capture card (tv2000xp), and turned off every
> channel
> > that is not in use. This is driving me nuts. I have probably spent more
> > than 5 hours fudging with this. Any advice is greatly appreciated.
> I haven't used MythTV seriously, but try a different audio driver (OSS vs.
> ALSA, for instance) if possible. Also, bear in mind that if this "buffered
> audio" is a live stream from the net that's been compressed a lot, it by
> have
> inherent problems in how it was created, that aren't related to your
> system.
Do you have enough CPU power? It could be dropping audio. Are you using a
patch cable to line in. This also appears to be a software card (bttv
drivers?) so setting you video resolution(480x480 myth default) down
(352x240)may free up some pci bus bandwidth.

David Foster
Bellingham WA
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