Apple had 1bit sound, forgot about that, so just a square wave, was thinking it was a piezo. Think the piezo came a bit later, I remember it on DOS machines but I was quite young back them. C64s SID chip/MOS 6581 was a decent little 8 bit synth limited in the sounds which could be created compared to a real synth but the best built in computer synth of the time hands down.
