From: gtr on
I have been doing some video (with audio) recording.

I've used QuickTime to do recordings and in the video viewer screen for
recording there options that allow the selection of various video
sources (I have both a built in iSight with my iMac as well as an
outboard iSight camera/mic), and audio sources which include both
iSight, internal mic and a USB source I have for interface with my
mixer.

I have been using my outboard iSight camera for video and my mixer for
audio. In this way I can add reverb to both a guitar and vocal
microphone separately and it is vastly better than the little mics in
the isight devices.

I note in iMovie that in the recording screen I have a selection option
but it only indicates video sources, there are no selection of audio
sources. Thus I can't select my mixer (via USB) for a sound source.

Is there no way to select an audio source in iMovie other than those
associated with the cameras?