For Podcasting, how do I send MegaSeg’s audio mix to GarageBand?
There is a free (open source) solution called Soundflower, which is a virtual “Patch Bay” of sorts. What it does is install a virtual sound input and output device. MegaSeg can then be set to output to the “Sound Flower 2ch” output, and GarageBand can be set to input from the same. You now have a direct digital patch between the two. Sound Flower is easily installed using Audio Hijack from Rogue Amoeba. Just download the demo, and it has an option to install SoundFlower.