eh,
i'm not sure what you're trying to do with audacity (with audacity, my knowledge is limited to cloning left channel into right channel).
but i can explain what stereo mix does (i hope!). i'll start by telling what stereo mix is, and isn't:
- you can't use Stereo mix to record yourself saying stuff (voiceovers), at least not in a way that i know of.
- you can use Stereo mix to record you playing "call of duty" (in game sounds, voices, explosions), and stream it directly via skype, discord, probably even twitch.
why? that's probably has to do with how stereo mix works.
when i said stereo mix allowing you to record whatever you heard on the computer, i actually meant: what your computer is playing via line out. so if you play a youtube video on your computer, and at the same time, you select your recording devices = Stereo Mix, you should be able to open your recording program and record the youtube audio outright without even having a physical microphone recording from your speakers. the quality is (somewhat) preserved this way.
let me put it in simpler terms: think of stereo mix as a bridge between your Line Out audio to an imaginary microphone (stereo mix). it merely duplicates whatever you will hear from line out and throw it back into the soundcard's "microphone".
how you can apply stereo mix feature is up to your imagination. i merely use it to stream stuff while i don't feel like talking. (what they hear = what i hear).
no siggy, saw stuff that made me sad.
