I have a Chromatic too, I think. Doesn't have a little button on the side you push to change the sound? I paid about $50. for it about fifteen years ago. I guess I could find it if I looked for it. I really would like to learn to play it. My problem is learning how to make my lips and tongue only play one note at a time. I think it sounds better anyway when you play it in harmony with other notes, as long as you hit the right center note. Phil