Extreme Korg Monotron Mod – The ‘Korg MS-X’

French musician Soul Machine shared this video demo of the ‘Korg MS-X’ – an extreme Korg Monotron mod, inspired by the design of the classic MS-10.


  • Voltage Controlled Oscillator (VCO):
    • Scale: 32′, 16′, 8′, 4′
    • Waveforms: Triangle, Saw, Pulse (with VCPWM), VCO off
    • Variable pitch control
    • Glide control
    • Sub Oscillator
  • Voltage Controlled low-pass Filter (VCF):
    • Cutoff Frequency control
    • Peak (Resonance) control
    • Keyboard tracking switch
  • Voltage Control Amplifier (VCA):
    • MS10 VCA clone
    • Feedback loop
  • Modulation Generator (MG):
    • Waveforms: Triangle, Saw & Square
    • Frequency control
    • Frequency modulation of VCO & VCF
  • Envelope Generator (EG):
  • Attack, Decay, Sustain, Release
    • Frequency modulation of VCO & VCF
    • Amplitude modulation of VCA
  • Features:
    • CV/gate
    • Drone mode
    • Manual gate trigger

Details on the mod are available at the Soul Machine site.

11 thoughts on “Extreme Korg Monotron Mod – The ‘Korg MS-X’

    1. anyone that’s used them for a while knows they sound very amazing i’d say. has the ms20 filter, free-floating vco and lfo, bucket brigade echo stronger than most on the market on the delay one. incredible as an effect on anything 1/8th.

Leave a Reply