I see the + sign above slider, upon clicking it, the only option that pop up
is "Record without Monitoring", and it is checked right now.
I don't see "Mute While Recording" there, but I do see this option in TV
wonder's options, it is checked there currently. The sound is not muted
while recording.
in Audigy2 mixer, there are several sliders under "Souce", among them "Wave"
and "Line in"
While capturing TV, if I mute "Wave" manually, the echo goes away, TV sound
is still heard through the speakers. If I mute "Line in" too, then the TV
wonder shut up completely. but I don't think any sound will be recorded.
So while capturing TV, the sound goes to speakers from two Channels: "Wave"
and "Line in".
Question is: What the hell is "Wave"? there is NOT an input on the sound
card called "Wave"! But there is an input called "Line in".