MS-20

Two oscillators, high- and low-pass filters and a patch panel for new connections.

Product photograph: Korg · history of the original MS-20

Why this synth?

The MS-20 is a monophonic synthesizer with 37 keys. Its basic route is internally connected, so you can play without patch cables. The patch panel changes control and modulation. The external signal processor also lets you explore other audio sources.

Model & versions

The original model appeared in 1978. The later MS-20 mini is smaller and has MIDI/USB; those features cannot automatically be attributed to a vintage MS-20. Identify the version in every listing and use its own documentation.

Explore the sound architecture

Choose a section and discover what it does.

Oscillators

Two VCOs provide the starting material. Their tuning and waveforms change the combination.

What to check

Listen to each oscillator separately, then together.

Open the manual ↗

Before buying an instrument

Start without patch cables and test every key and both oscillators.Test filters, envelope, controls and sockets with a simple basic setting.Ask for a demonstration of the patch panel and external signal processor using the manual.Check whether it is an original, mini or other reissue; ask about repairs and modifications.

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

Documentation & sources

Korg · MS-20 Original Owner’s ManualOriginal controls and patch panelHandleiding ↗Korg · History of the MS-20Introduction, 37 keys and original hardwareHistorie ↗Korg · MS-20 miniThe later smaller reissueModelverschillen ↗

Sources consulted: 6 October 2026.

Experiences & questions

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Specifications & methodology

Keys: 37
Voices: 1
Sound source: 2 VCO’s
Filters: HPF + LPF
Program memory: Geen
Control: CV / trigger / patchpaneel

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.