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

[Frank Martelli]

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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