1973 Yamaha?s organ division began to develop a prototype FM mono synth. A FM polyphonic prototype was built 1975 (the monophonic version was called "MAD"). 1983 Yamaha released the new product line synthesizers called DX. The rest is history. DX7 was one of the first synthesizers with MIDI, had no knobs, no oscillators, no waveforms. And it didn't sound like any other synthesizer at that time. Later on in Tokyo December 1986 (and in USA January 1987) came the successor to the DX7: DX7II.DX7 II FD, containing a Dual set of sounds that can be played simultaneous, equipped with a Floppy Drive.


  • Keyboard:- 61 Keys (C1~C6), with Intial/After Touch
  • Tone Generator:- FM Tone Generator (6 operators and 32 algorhythms)
  • 1-Voice:- 16 notes (single play)
  • 2-Voice:-  8 notes (dual play)
  • 2-Voice (split):-16 notes (split play)
  • Internal Memory:- 64 voices/32 performances, 2 micro tunings,1 system set-up
  • External ROM Memory:- 128 voices/64 performances, micro tuning, fractional level scaling
  • External Memory:- RAM Cartridge (optional, RAM4) - Internal Memory; Micro Floppy Disk (Optional, MF2DD) - Internal Memory x 40, MIDI Exclusive Data
  • Sliders:- Volume, Continous Sliders CS1, CS2 (data entry)
  • Switches:- Date Entry Switch (2), Mode Setting Switch (12), Voice Switch (32)
  • Wheels:- Pitch Bend Wheel, Modulation Wheel
  • External Control Terminals:- Breath Control, Sustain, Foot Switch (Sustain, Portamento, Key Hold, Soft), Foot Control 1 (Volume, Modulation, Voice Parameter), Foot Control 2 (Volume, Modulation), RAM/ROM Cartridge Slot, MIDI-In/Out/Thru
  • Output Terminals:- Output A/Mix-B, Headphones
  • Disk Drive:- 3.5" Internal Floppy Disk Drive, 2DD IM Bytes (120K when formatting)
  • LC:- 40 letters x 2 lines (illuminated)
  • LED:- 7 Segments x 2