Sound sources on Mac

Fri Apr 24 13:43:43 EDT 2009

Is there something I could call that would reveal the current sound
sources on a Mac?
Or does one 'just have to know'?

For instance there doesn't seem to be a code for the audio from my USB
headset or the digital in on my MacBook Pro.  (yes folks, there really
is one on the 'combo' input port.)

Applescript or shell is ok...

-------------------------
Stephen Barncard
San Francisco
http://barncard.com