I've been trying to find a program that would work on the Macbook Air that would automatically transcribe what I play on guitar. I use a Line 6 Pod HD to connect my guitar to the computer, and fiddle around with Garageband. I know there are programs out there that can transcribe music, but I cannot discern if they can do so with real-time playing. Maybe it doesn't exist. I've looked into Guitar Pro 6, etc., but it doesn't seem to do what I need. Any ideas?