Sean decapped/dumped Concept 2000 Mr. Mus-I-Cal. I won't post a screenshot, it's simply a 7seg display. But here's someone trying to play Jingle Bells on one.
Oh, it just makes a tone for each number like a phone, but on a major scale rather than DTMF. That’s a little disappointing – I was hoping for a tune programming mode or something.
