It took me forever to discover that the wireless button in the "on" position was causing the pops and crackles on playback. Last night on a gig I heard a couple of loud pops. And, sure enough, that slider had gotten bumped on some way. Once or twice, the real bass in BIAB has gone wackoo in the middle of a tune. Re-playing the tune from start seems to cure it. And, do you ever have a real track that fails to load properly? That happens with me occasionally, mainly with the bass track. I quickly reload the song and it plays OK.