[mythtv-users] no sound with C-media 8738

[Joseph A. Caputo]

On Sunday 28 September 2003 11:11, Edward G Finegan wrote:
> Ok here is an update. I got the sound to work for live TV. Not really
> sure what I did to finally get this. However the sound is not the best
> quality. It is a lower volumn then my main system sound and hisses. When
> a show is recorded there seems to be no sound at all.


Unfortunately, I believe you will always have that hiss when using the CMI8738 
in full-duplex mode.  IIRC, it chops the sample size in half to do duplex; 
i.e., normally it is 16-bit sound, but to do duplex it can only do 8-bit 
sound on both in and out.  I ditched my onboard CMI8738 sound and got a 
decent sound card, which ended up being a wasted of money as shortly 
thereafter I found I could get btaudio working on my WinTV-radio.  If btaudio 
is not an option, then I recommend either getting a good sound card that does 
full duplex, or at least a second sound card so you can use one for recording 
and one for playback (in which case you don't care if it does full duplex or 
not).

-JAC