Quote:
When I start up Stereo Tool It locks up into a feedback loop that gets louder and louder. I have no headphones or microphone hooked up and all other recording sources are muted. When I uncheck "Stereo Mix" on my recording control panel the feedback commences. What am I missing?
You should make sure that in the mixer the OUTPUT is not sampled again.
Stereo Tool does this:
Sound card input --> Stereo Tool --> Sound card output
So if in the sound card settings the output is sampled (which can be useful for example to record audio that you're playing in another player), you'll get a feedback loop.
By the way: If you just want to listen to processed audio in an MP3 player, you need a plugin version instead of the stand alone version...