Hey guys I recently bought a nice macbook pro and Was enjoying all it has to offer until today. I went to plug in a motif piano into the input and it wouldn't record any sound from the convered 1/4 inch cable. Instead all of the sound was my hands hitting the plastic keys picked up by the onboard mic. What must I do to record? Also I'm doing a video project for my church and It requires a bunch of vocal tracks. any ideas on how to hook a mic straight into garageband without running through a sound system? Thanks so much!