Yamaha DX7
Digital programmable algorithm synthesizer

Yamaha DX7


The DX7 is without any doubt a milestone in synthesizer history. It achieved a great success over the years and has now a cult status among players and aficionados, but we must remember that in 1983 it wasn't a groundbreaking instrument, rather a mix of the latest technologies already available.

FM synthesis was in development since the late 70s at Yamaha, with the GS lineup already equipped with digital FM capabilities. It sounded great, but had to be programmed using an external computer, and was extremely heavy, bulky and expensive. Roland was already producing cheap polyphonic synthesizers for the public: for example the Juno 6 retailed for far less than 1000$ in 1982. Nothing particularly innovative with the interface either, as the 1981 Rhodes Chroma already adopted membrane switches and sliders, and many synthesizers already had command panels flush with the keyboard.

Eventually the convergence of all these single avant-garde instances successfully resulted in a synthesizer that received lots of praise for its sonic capabilities. Its engine however requires a different attitude to be programmed, something that since 1983 scared away lots of players used to the common oscillators+filter scheme but can be learned for sure.

The DX7 FM engine has 6 operators, 32 algorithms, pitch envelope generator and keyboard scaling. Modulation can be achieved through foot switches, breath controllers and keyboard aftertouch. Voices cannot be stacked and a basic MIDI implementation is provided, although many later expansion will add these features.

Additional patches storage relies on RAM cartridges type 1, and many presets carts were manufactured also by third parties as the engine could to so much more than the limited selection of factory presets.

Technical specs


61 keys
Touch control: inital touch, after touch

Sound source

FM tone generator (6 operators, 32 algorithms)

Simultaneous note output

Polyphonic: 16 notes
Monophonic: 1 note

Memory capacity

Voice memory: 1 bank x 32 voices

Connection terminals and interfaces

Output (unbalanced)
Output Phones (phone jack)
Control jack: foot switch, foot control
Cartridge insert
Breath control

Dimensions and weight

1018w x 102h x 329d (mm) / 40” x 4” x 13”
14.2Kg / 31.2lbs


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