Had this happen to me as well, had layed a track down, was in the process of editing the track, decided to silence a part of it, hit stop rewind play and got nothing but popping as the track played.also my drum tracks jump out of sequence.Now mind you I've only had the machine a short time, this being my second song with the machine, but seemed to me at the time it was in the editing software, our i possibly hit to many buttons and didn't know it and it had a fit.One thing i due know is i changed the bit to 24 for this song.So i just erased the song and hasn't done it sense.So for me anyway, when it comes to the editing part of the board, iam walking softly.
