I've looked all over the internet for a clean way to reroute the audio output of my computer (i.e. what I'd hear from the speaker) to my microphone's input.
Possibly, I'd like to do this at low level (e.g. using ALSA).
I'm basically looking for an equivalent of
pacmd move-sink-input #index #sink
that gets some audio input and pipes it to the microphone.
If it's still not clear, my final goal would be, for example to play a video on Youtube and let a friend of mine listen through Skype. I'd like that kind of flexibility.