[mythtv] Jittery sound - ALSA / AC97

[Robert Dege]

Try lowering the volume on the PCM.  On my SBLive, if I have PCM all the
way up I get ticking, and chirping noises.  Lowering it to 75-85 helped.

-Rob

> MythTV 0.7
> Mandrake 9.0
> AMD Athlon 1600+, 512MB
> on-board VIA 8233 (AC97) sound
> ALSA 0.9
> ATI TV Wonder (TV/Video in), ATI AIW Radeon (Video only)
> External connection between the TV Wonder line-out and the AC97 line-in
>
> XawTV works fine.
>
> In MythTV, the sound is very jittery (loud ticking / interference noise over
> the sound) when I select line-in as the recording source, mute line-in, PCM
> 100%, igain 100%.  Alsamixer shows a red "capture" above the capture bar.
>
> If I mute PCM and un-mute line-in, the sound is fine, but of course then the
> sound is not synchronized with the video.
>
> From /etc/modules.conf:
>   # On-board sound
>   above snd-via8233 snd-pcm-oss
>   alias sound-slot-0 snd-via8233
>
> Any ideas?  Can't seem to find anything relevant in the mailing list archives.
>
> Brett
>
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Dege

So Many Things in Life Would Be Really Funny
.... If They Weren't Happening To Me