Yes, I thought MSXes were just based around some
common sound chip.
Perhaps the AY-whatever-it-was as used in the later Sinclair machines (and
doubtless countless others).
AY-3-8910
There are actually 3 such chips, all have 3 sound channels and the noise
channel, all are software-compatible. The AY-3-8910 )40 pin DIL) has 2 8
bit I/O ports, the AY-3-8912 has one port, and the AY-3-8913 has none.
-tony