How quickly we forget the chip tunes of the PC Speaker, I used it in a computer lab one day to play a nearly undetectable high freq wave using logo. The PC Speaker was a pretty flexible little speaker
Flexible enough that Access Software built a library called RealSound that could do 6-bit PCM audio over it. Which isn’t great but is dramatically better than you’d expect. A bit over a dozen or so games used it.
I had one called Mean Streets that used it for things like voice. The game came with instructions for how to build a cable to connect your internal speaker to an RCA cable to run to a stereo or similar.
I used the Amiga disk drive to play music. It sounds like you would imagine. And will destroy the drive if you play too much.
Nice I couldn’t imagine playing music on my c64’s 1541 drive the thing made scary knocking noises when it worked properly!
The c64 could do all sorts of music over the TV speakers, even voices. Who can forget Impossible Mission “Another visitor, stay a while, stay forever!”