A sound chip is an integrated circuit (i.e. "chip") designed to produce sound (see chiptune). It might be doing this through digital, analog or mixed-mode electronics. Sound chips normally contain things like oscillators, envelope controllers, samplers, filters and amplifiers.
Read more about Sound Chip: Programmable Sound Generators (PSG), Frequency Modulation Synthesis (FM Synth), Pulse-code Modulation (PCM, Sample-based)
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