XYScope and FFT sketch - Assign audio input?

[glv]

This may help:

Getting live audio input

So I’m brand new to working with audio in any form, and I’m hoping you folks can point me in the right direction. A DJ friend of mine wants my processing sketch to react to his audio. He said he could plug his output into my laptop and that it would show up as an “External sound card driver.” I’m kind of at a loss to where I should go from here. The Sound library IO examples shows how to get live input from the microphone, but can anyone tell me how to get it from the sound card itself? And if…

:)