I have the same thing with voice. When I'm speaking they hear me fine.
But I can't use any kind of broadcasting program or music cart because any other input besides microphone is sooooooooo low
(about -50dB to even -60dB)on the winamp DSP plugin output . I'm testing everything on inside network so I can hear the broadcast myself and nothing seems to be working.
If you have opposite at least you can do everything. You just have to watch the system sounds. That's all. We are very limited to just play in winamp.