Objective C: Record audio from speaker output?

Question

I am trying to make a Mac app that will be able to record the audio that is being played through the speakers/headphones.

Is the only way to do this to have it play over the speakers and then pick it up via the microphone? Or can you capture it before it leaves?

Thanks.

Answer 1

SoundFlower is an applcation that does this. Check out it's source code here.