Korg MS20 Mini Analog semi-modular synthesizer, 37 Key

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Korg MS20 Mini Analog semi-modular synthesizer, 37 Key

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Korg MS20 Mini Analog semi-modular synthesizer, 37 Key

MS-20 mini


Monophonic Analog Synthesizer

The classic MS-20 –recreated in mini size!

An analog synthesizer featuring the original circuitry from 1978 

Korg’s MS-20 monophonic synthesizer, first introduced in 1978, is still a coveted instrument to this day, thanks to its thick, robust sound, its powerful, iconic analog filter, and its versatile patching options. Over 300,000 people have enjoyed the distinct MS-20 sounds from the original, from Korg’s MS-20 plug-in synth, or the iMS-20 iPad app.

Today, the sounds of the MS-20 have been reborn in hardware, as the MS-20 Mini. The same engineers who developed the original MS-20 have perfectly reproduced its circuitry and fit into a body that’s been shrunk to 86% of the original size, yet retains the distinctive look of the original. 

The MS-20 mini will amaze you with its absolutely authentic analog synth sound.

Comments from the developers
Fifty years have passed since Korg was founded, and we have once again put our hand to an analog synthesizer. We took particular care to deliver smooth parameter adjustments, which are a distinctive feature of analog synthesizers. We also took special care to completely reproduce the original specifications of the MS-20. The analog circuits we designed 35 years ago still deliver the same unbeatable, powerful sound, from the ultra-low to the ultra-high range.

Read the full interview with the original developers here!



  • Overseen by the engineers of the original MS-20, a complete replication of the original analog circuitry



    • 2VCO / 2VCA / 2VCF / 2EG / 1LFO structure


    • Self-oscillating high-pass/low-pass filters with distinctive distortion


    • External signal processor (ESP)


    • Extremely flexible patching system


  • Miniature MS-20 that's 86% of the original size


  • MIDI IN and USB connector


  • Replicates every detail of the original, down to the package binding and the included manual



< Control Section >


    C - C 37-notes (3 octaves), mini keyboard designed specifically for the MS-20 mini

Voltage Controlled Oscillator 1 (VCO 1):

      Scale (32', 16', 8', 4') (6 octaves, +cent, -cent)


      Wave form (Triangle, Sawtooth, PW-Square, White Noise) (4 modes)


    Pulse width adjust 1:1 - 1:infinity

Voltage Controlled Oscillator 2 (VCO 2):

      Scale (16', 8', 4', 2') (6 octaves, +cent, -cent)


      Wave form (Sawtooth, Square, Pulse, Ring modulator) (4 modes)


    Pitch (± 1 octave)

VCO Master control: Master tune (± 100cent):

      Portamento (max. 10sec)


      Frequency modulation intensity by MG/T.EXT (-5V - +5V)


    Frequency modulation intensity by EG1/EXT (-5V - 0V)

VCO Mixer:

      VCO 1 Level


    VCO 2 Level

Voltage Controlled High Pass Filter (VCF HPF):

      Cutoff frequency (50Hz - 15,000Hz)


      Peak (flat - self OSC)


      Cutoff frequency modulation intensity by MG/T.EXT (-5V - +5V)


    Cutoff frequency modulation intensity by EG2/EXT (-5V - +5V)

Voltage Controlled Low Pass Filter (VCF LPF):

      Cutoff frequency (50Hz - 15,000Hz)


      Peak (flat - self OSC)


      Cutoff frequency modulation intensity by MG/T.EXT (-5V - +5V)


    Cutoff frequency modulation intensity by EG2/EXT (-5V - +5V)

Envelope Generator 1:

      Delay time (10sec)


      Attack time (10sec)


    Release time (10sec)

Envelope Generator 2:

      Hold time (20sec)


      Attack time (10sec)


      Decay time (10sec)


      Sustain level (0V - 5V)


    Release time (10sec)

Modulation Generator (LFO):

      Wave form (Positive Sawtooth - Triangle - Negative Sawtooth, Wide Pulse - Square - Narrow Pulse)


    Frequency (0.1Hz - 20Hz)

Manual controller:

      Control wheel (center click)


    Momentary switch -->GND

Power switch and Volume:



    LED (KBD trigger, Modulation Generator rate, Power ON )

< External Signal Processor >

Control section:

      Input signal level


      Low cut frequency (50Hz - 2,500Hz)


      High cut frequency (100Hz - 5,000Hz)


      CV adjust


    Threshold level

Input and Output:

      Signal In


      Amplifier Out


      Band pass filter Out


      CV Out (0 - +8.4V)


      ENV Out (0 - +5V)


    Trig Out (+5V-->GND)

Indicator (LED):

      Peak indicator


    Trigger indicator

< Patch Panel >


      Keyboard control voltage output (Exponential) (0 - +8V)


      Keyboard trigger output (+5V-->GND)


      VCO-1 + VCO-2 control voltage input (Linear response)(0 - +8V)


    VCO-2 control voltage input (Linear response) (0 - +8V)


    VCO-1 + VCO-2 external frequency control input (OCT/V) (-5V - +5V)


      External signal input (3Vp-p max.)


      External High pass filter cutoff frequency control input (2OCT/V) (-5V - +5V)


    External Low pass filter cutoff frequency control input (2OCT/V) (-5V - +5V)


    Total external modulation input (T.EXT)(-5V - +5V)


    External initial gain control input (0 - +5V)


      EG 1 envelope signal normal output (-5V - 0V)


      EG 1 envelope signal reverse output (+5V - 0V)


      EG 1 + EG 2 trigger input (-->GND)


      EG 1 trigger input (-->GND)


    EG 2 envelope signal reverse output (+5V - 0V)


      Triangle output (Positive Sawtooth - Triangle - Negative Sawtooth) (5Vp-p)


    Rectangle output (Wide Pulse - Square - Narrow Pulse)(0 - +5V)

Noise Generator:

      Pink noise output (5Vp-p)


    White noise output (5Vp-p)

Sample and Hold:

      Clock trigger input (-->GND)


      Sample signal input (5Vp-p max.)


    S/H output (5Vp-p max.)

Modulation VCA:

      Control voltage input (0 - +5V)


      Signal input (-5V - +5V)


    Signal output (-5V - +5V)

Manual controller:

      Control wheel output (-5V<--0V-->+5V)


    Momentary switch output (-->GND)

Signal out:

    Signal output (mono 1/8" mini phone jack, 2Vp-p output impedance 3.5k ?)

Head phones:

    Head phones output (Stereo 1/8" mini phone jack, 33 ? 48mW)


    Type B, USB-MIDI Input/Output

* Only note messages (velocity is not used) can be transmitted and received.


    MIDI Input

*Only note messages (velocity is not used) can be transmitted and received.

Power Consumption:


Power Supply:


Dimensions (W x D x H): a

    493 ×257 ×208 mm / 19.41 x 10.12 x 8.19 inches


    4.8 kg / 10.58 lbs.


    AC adaptor (9V/1.7A), Patch Cord x 10



Derringers Music in Adelaide is South Australia’s best place to shop for all your Korg keyboards, synths, music instruments accessories and other creation tools.

Korg manufactures electronic musical instruments, audio processors and guitar pedals, recording equipment, and electronic tuners. 

Founded in 1962 the company's first product was an electro-mechanical rhythm device the, Donca matic DA-20 mad 18 months later Korg released a programmable organ. The name KORG, created by using the first letter of each founder's name plus "RG" from their planned emphasis on products targeted for the organ market emphasizing the letters R and G in the word organ.

Since those early days Korg has since diversified into digital effects, tuners, recording equipment, electronic hand percussion, and software instruments. Korg is credited with a number of innovations and landmark products through their strong understanding on providing quality professional musical products. 


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