First off, I did try the factory reset a couple times. The problem: With Bellow Curve set to 5-8, behaves as if fixed setting 1-4 with a major difference, pushing the bellows in quiets the sound. ( Pulling bellows is just like fixed mode). One time all notes decided to play at once and would not stop until I powered down. Major gremlins here. Wondering if there is a more advanced factory reset, or firmware reload possible.