Rhodes Chroma
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The ARP Chroma is a polyphonic, multitimbral, microprocessor controlled, subtractive synthesis analog synthesizer developed in 1979-1980 by ARP Instruments, Inc. just before the company's bankruptcy and collapse in 1981. Wikipedia
Aftertouch expression: Yes (optional - Polyphonic)
Keyboard: 64 levered weighted keys, velocity sensitive, optional pressure sensitive
Oscillator: 16 (1 or 2 per voice) VCO
Polyphony: polyphonic 8 or 16