The Programmable Sound Generator (PSG) is a sound chip designed by General Instrument (GI) in 1978. The specific model used in the CPC is the AY-3-8912 chip.
The PSG is quite primitive. It is able to output a square wave and/or white noise in three separate sound channels (named Channel A, B and C). Each channel can be Some other 8-bit systems used to output tones andmore sophisticated soundchips such as the Atari Pokey, the Mullard/or white noisePhilips SAA1099, the NES APU and the Gameboy soundchip.
== PSG Part numbers used in the CPC during its lifetime ==