Yamaha Dx7 Digital Synthesizer Polyphony - 16 Voices, Oscillators - 16 bit Digital 6 operator FM. #Instruments - (1) Monotimbral, LFO - Sine/Square/Tri/SAW up/SAW Down/Random VCA - 6 Envelope generators 8 parameters each, Keyboard - 61 keys (w/ velocity and aftertouch) Memory - 32 Patches, Control - MIDI Date Produced - 1983-87