Yamaha DX100

Digital programmable algorithm synthesizer

Yamaha DX100 portable synthesizer
Buy one (18 on sale)

1985 (Dec.)
Initially sold for ¥65,000

Released in late 1985 together with the DX27, the Yamaha DX100 is a full 4-op FM synthesizer in a small, portable form factor. It retains all the editing capabilities of its parents at an extremely affordable price for the consumer market — 349£ — being at the time the cheapest way to get into Yamaha's sounds.

With its miniature keys, battery power, strap buttons on the side and mod/pitch wheels conveniently located at the top edge it's perfect to be used standing with a shoulder strap.

Internal memory was also surprisingly bigger than the DX27 or the DX21 given the smaller size. 192 factory voices and a volatile Edit bank that can be filled with voices from the internal memory or from a tape through the cassette port.

Praised by the critic for its convenience and MIDI response, at the time of this review the DX100 remains curiously hard to find online, selling sometimes at prices higher that the DX7.


  • 24-voice internal RAM memory.
  • 192 voices programmed into internal ROM.
  • Bank Play mode permits direct access to 96 voices, programmable in any order.
  • Shift mode permits access to another 96 voices.
  • Built-in cassette interface for voice data storage.
  • The DX100 keyboard itself does not have key velocity, but its tone generators accept key velocity data from an external MIDI keyboard or sequencer.
  • Sustain/portamento footswitch and breath controller inputs.
  • MIDI IN, OUT and THRU terminals.
Yamaha DX100 on After Touch
Yamaha DX100 on After Touch
Yamaha DX100 brochure
Yamaha DX100 brochure
DX100 on International Musician, Feb 1986
DX100 on International Musician, Feb 1986




49 keys (mini keyboard)

Sound source

FM tone generator (4 operators, 8 algorithms)

Simultaneous note output

Polyphonic: 8 notes
Monophonic: 1 note

Memory capacity

24 voice internal RAM (alterable)
192 voice ROM (reading only)
96 voice number bank (alterable)

Connection terminals and interfaces

Output A (mono phone jack)
Output Phones (mono phone jack)
Control jack: foot switch
Cassette port
Breath control

Dimensions and weight

628w x 75h x 218d (mm) / 24.7” x 2.9” x 8.6”
2.7Kg / 5.9lbs

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Yamaha DX100

YAMAHA DX100 keyboard (A03002520)

Buy used YAMAHA DX100 keyboard (A03002520)
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Yamaha DX100 Programmable Algorithm Synthesizer

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Yamaha DX100 Digital Programmable Algorithm Synthesizer From Japan Used

Buy used Yamaha DX100 Digital Programmable Algorithm Synthesizer From Japan Used
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