[linux-audio-user] Disabling Playthrough

[Darren Gibbs]

I'm a newbie to audio on Linux. So far things are working OK, but I 
can't figure out for the life of me how to disable audio playthrough. 
I'm running SUSE 9.2 w/KDE on a Dell Inspiron 600m.  No applications 
are running, but somebody is echoing line in to line out.  I've looked 
through KDE, YaST, and ALSA controls for audio but I can't find a 
setting for playthrough.  Google searches have failed me... any advice 
appreciated.

thanks,

darren