I'm really happy with my BeatBuddy, and want to congratulate you folks on your efforts. I do have a question though. I notice that I can change songs quickly, unless the change invokes a new drum set, in which case, it takes the green bar like 15-30 seconds to load up and become ready to play. Is this normal behavior, or do I maybe have a slow SD card? And to that point, would I be happier if I invested in a top-grade max performance SD card?