Hi everyone. Iâ€™m new to GarageBand, and would really appreciate it if someone could explain how I could record vocals and piano (or guitar) at the same time on my MacBook, using my Focusrite 4i4 for the instrument and my Samson C01U Pro USB mic (which, unhelpfully, canâ€™t plug into the Focusrite). Iâ€™ve tried creating an aggregate device, but didnâ€™t understand the parts about the word clock and so forth. Or is it simply not possible, and I'll need to buy a non-USB mic to hook up to the Focusrite? Thanks in advance!