I did some searching and I didn't find an answer.. so don't whine. Anyway. I plugged my Yamaha Clavinova into my 15" Unibody Macbook Pro and I'm only getting the left channel in Garageband and I'd love it to be Stereo. I'm using a stereo cable and my Clavinova is definitely able to send stereo. I do hope the MBP has a stereo line-in. I'd rather not have to get a dongle. Any ideas?