DX7

Six operators, 32 algorithms and a different way to build sound.

Product photographs: Yamaha · Design Insights

Why this synth?

The original DX7 makes sound with six digital operators. An operator can be audible or modulate another operator. The selected algorithm determines the connections. Its 61 keys respond to velocity and pressure; it plays up to sixteen voices.

Model & versions

Yamaha introduced the DX7 in 1983. The flat membrane panel and green controls reflected its digital approach. This dossier covers the first DX7; DX7II and DX7s have their own manuals and should be identified as separate models when buying.

Explore the sound architecture

Choose a function; operator connections depend on the algorithm.

Operators

Each operator combines a sine source with its own envelope. A modulator changes another operator’s spectrum.

What to check

Test several presets and vary operator level and frequency ratio.

Open the manual ↗

Before buying an instrument

Test every key, velocity and aftertouch with a suitable preset.Check the display, membrane buttons and data-entry slider.Ask for program storage and recall; ask about the memory battery and backups.Match model name and connections to the correct manual; test MIDI and audio.

This checklist is saved on this device. It is not an inspection report.

Documentation & sources

Yamaha · DX7 Operating ManualSpecifications, operators and controlsHandleiding ↗Yamaha · DX7 Design Insights1983 introduction and designHistorie ↗Yamaha · Manual Library · DX7-familieManuals for each versionModelverschillen ↗

Sources consulted: 6 October 2026.

Experiences & questions

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Specifications & methodology

Keys: 61
Voices: 16
Sound source: 6 operators · FM
Algorithms: 32
Program memory: 32 intern
Connection: MIDI

This dossier covers the original hardware. Controls and technical data are based on manufacturer documentation; buying checklists are our editorial suggestions. No in-house listening test or valuation.

DX7