I chose a style with the rhythm I like (SEEKER.STY), but I want to use Acoustic String Bass, rather than the Fretless Bass that it has. I have changed the patch in the Mixer area, and it shows "33 Acoustic String Bass", but still plays as fretless. I can "rechange" it while the song is playing, and it changes to playing acoustic bass; but then at certain points in the song changes back to fretless! I've tried the "frozen" setting for bass while playing and saving the song; then tried without being frozen. Nothing seems to help. Maybe it has something to do with substyles?? I'm on BIAB 2014. Thanks for any help.