Damn, that'll teach me not to throw out obsolete stuff. I wrote a simple piece of music software for my Amstrad CPC464 back in the mid-eighties. It took input from the keyboard (using shift/ctrl for sharp and flat, if I recall), displayed musical notation on screen and played it through the primitive sound chip.

I eventually got it to play one of Bach's 48 (preludes & fugues). I seem to recall that it had 4 channels, so could cope with the 4-part counterpoint pretty well. The sound chip was horrible, but if you specified a rapidly decaying envelope it could sound very roughly like a plunckety-plunk "harpsichord".

All gone now: It was stored on one of Alan Sugar's ridiculous 3 inch disks (not 3 1/2 or 5 1/4, and entirely proprietary to his toy computers).

Reminds me of a little rhyme my Dad taught me:

See the happy moron,
He doesn't give a damn.
I wish I were a moron,
My God... Perhaps I am!