I run GarageBand on my MacMini with a simple USB audio interface. I want to be able to play my electric guitar through GarageBAnd so the sound with SFX is what is fed into Skype and other video chat sites, as if this were my microphone.
But I think selecting the USB device as my audio input will give me only the dry sound from my instrument, not the modified sound from Garageband? So how can I do what I want without expensive equipment?
I have realised my USB interface has a mixer inputs/playback which means through headphones I can choose to select only the processed output from GarageBand if I set the interface as my audio-out... but how do I get that back into the Mac short of putting a cable from the headphone-out => Mac line-in?!