I'm just beginning to learn what my G-DEC amp can do. I'm working my way through the BGU courses and can't figure out if I can play the backing tracks from the lesson CD's through the amp itself. Can anyone answer this question. I'm not very tech savvy. I bought an SD card reader, and appears I have the first CD loaded on to a SD card, but I can't get the amp to play from the card. Any help? I'm spending more time trying to figure this out than I am spending time practicing.