A 48-voice polyphonic semi-modular analog synthesizer with a 48-note keyboard. Released in August 1977.

The PS-3100 features a massive 48 note polyphony, a voice for each key. The sounds are generated with 12 divide-down VCOs, making them thin (although the polyphony makes up for it). As a filter there is an unusual "triple resonance" VCF, which can be used for interesting phonetic/vocal sounds. Also included are an LFO and 3 limited EGs with no release control. Sample/Hold is available, but there is no patch memory.

The main panel of PS-3100 is similar than in the MS line, with both hard wired and patchable routings. The patch bay adds extra flexibility to the otherwise limited programmability.

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