Hi,
actually my very first music computer was the commodore 64's predecessor the "Vic 20"
I think it must have been round 1981/82??
Beeped a great tune. From memory, I think I was able to type in a melody line & it played it back. It may have been capable of doing more musically, but I really can't remember.
It was the culprit that got me interested in electronics & music. From there I went on to the c64, the Atari 1040 etc etc.
In hindsight, bet hubby's still regretting the day he said yes to the Vic. haahaa

best wishes
Rikki