[mythtv-users] Corrupt audio with i8x0 (sis7012)

Reza Naima reza at reza.net
Thu Aug 14 13:11:05 EDT 2003


I get a ton of distortion when I use these settings.  Going to '80%'
rather than '100%' work a lot better for me (built-in sound for pundit)... 

Reza

On Thu, Aug 14, 2003 at 09:32:25AM -0500, Frank Martelli sent me this...
> I think the mixer is set OK -- I used the commands from section 7.2 of the
> HowTo:
> 
> $ amixer set Master,0 100%,100% unmute
> $ amixer set Line,0 75%,75% mute captur
> $ amixer set Capture,0 100%,100% mute captur
> $ su
> # alsactl store
> # exit
> 
> The test 'aplay /dev/dsp' while running xawtv results in the same problem.
> 
> Possibly this is an issue with the ALSA driver?
> 
> -T
> 
> > On Thu, 2003-08-14 at 15:05, Frank Martelli wrote:
> >>
> >> When I 'watch TV' the audio is only good for ~2 seconds
> >> -- it then begins to 'echo,' where the first two seconds of audio are
> >> apparent in the loop (overlayed with new audio) until the audio stream
> >> degrades into unintelligible 'ringing'.
> >>
> >> If I actually record a program, I can then watch my recording without
> >> problem.  However, if I begin to playback a recording in-progress, the
> >> playback is fine until I hit the point where (real-time) I began the
> >> playback (i.e., the recording becomes corrupt when I start using the
> >> audio for output).
> >>
> >> Has anyone seen this problem before?  I am using the latest ALSA
> >> (0.9.6) and MythTV (0.10) versions under the 2.4.18 kernel.  Does this
> >> simply mean that my on-board audio is too feeble for MythTV?  Is this
> >> a general problem with the sis7012 soundcard?  Or do I just have some
> >> mixer setting all-wrong?
> >>
> >
> > It sounds like you have your recording input set wrongly on your sound
> > card. You need to have it set just to record the line input. If you set
> > it to record everything you will find myth records it's own output and
> > plays it back over itself until you are in feedback hell!
> >
> > Just change this setting using your favourite mixer (kmixer, gmix,
> > smixer) and hopefully that will help.
> >
> > Adam.
> >
> >
> >> Thanks!
> >>
> >> -Frank
> >>
> >>
> >>
> >>
> >> _______________________________________________
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> >> mythtv-users at mythtv.org
> >> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> 
> 
> 
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