[mythtv-users] CMedia 9739A - on board AC'97 audio - My Alsa woes

[Joseph A. Caputo]

On Friday 14 November 2003 02:10, Saravanan Subbiah wrote:
> I got sometime to get back to setting up my mythbox and everything
> went well till I had to set up sound.
>
> After upgrading to 0.9.8 alsa in my Gentoo installation, removing
> btaudio and inserting snd-pcm-oss module I was able to get alsa up.
> But there is no volume control. It is either mute or 100 %. I read
> somewhere that this is something to do with the codec which doesn't
> support it ?
>
> Also while recording/playing I find that there is a high pitched
> hiss. I could hear it even if I try aplay /dev/dsp with muted xawtv.
> And interestingly I find that this noise is higher in some channels
> than other.
>
> Has anybody gotten their C-Media 9739 chip to work (without the hiss)
> ?

Well, if the 9739 chip is anything like the 8738 chip, you won't be able 
to do anything about the hiss.  Search the archives for 'c-media' and 
'8738' for previous discussions on that chip.

-JAC