Recording Computer Aided Music, how to IAC patch together software generated sounds with OSX Options

[kookoohead]

I'm new to the Computer Music arena and I am fascinated by ambient sound generators. There are some nice pieces of freeware available and I have downloaded several. Some are completely automated, others are for live sound manipulation.

The question becomes: How to record the multiple, separate software applications into a single recording and allowing for the possibility of adding in guitar improvisations over the ambient background generated by the software (this is not even for midi control but just sound input from a mixing console).

The IAC connection function seems to be the key but I can't figure out how to get it to locate the separate programs and route them to the recording software. The menu options only seem to allow for adding external midi components, not the routing of software-generated sounds.

The technical question: How to set up the IAC connections for the software applications and the inputed sounds for a single live recording. Where can one find any documentation of this type of configuration. The tools to do this seem to be built-in to the mac OSX. Is there documentation anywhere that explains how to do this?