What is PSG?

PSG typically refers to the Programmable Sound Generator, a sound chip commonly found in older computers, consoles, and arcade machines. These chips are used to generate basic waveforms and sound effects, often through the manipulation of square waves, noise, and simple envelopes. Common examples include the AY-3-8910/YM2149 used in the ZX Spectrum, Amstrad CPC, and Atari ST, and the SN76489 used in the Sega Master System.