I wanted to record some guitar on MacBook Air (2014) and since it has only one audio port, I'm using iRig (which is said to be compatible). The only problem is that GarageBand doesn't record sound straight from the guitar, but it records... all the audio. It means it re-records drums, metronome and even volume changing bleeps. It also results in massive feedback and screeching noise. It doesn't help to turn monitoring off - it always records everything. I tried to change audio input/output settings, but there's only one option - built-in mic and built-in audio out (which is speakers and/or headphones, I think). The same happens on the iPad (it records drums instead of just the guitar). Is that how iRig works? Can I manually change the input/output settings so that GarageBand records only the mic/guitar? Thanks for your help in advance!