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MIDI Mutator

MIDI Processing Host Plugin Plugin by MusicDevelopments
MIDI Mutator
MIDI Mutator by MusicDevelopments is a Virtual Instrument and a Virtual Effect Audio Plugin and a Software Application for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin and a Standalone Application.
Supported operating systems: Windows 7/8/10/11 (32-bit or 64-bit)
Intel/AMD processor 1.4 GHz minimum
graphics card with OpenGL2 support
a DAW supporting VST or VST3 plug-in formats
macOS 10.11 - 13.0 (latest update)
Apple Silicon or Intel Core Duo
a DAW supporting VST, VST3, or AU MIDI FX plug-in formats
Stand-Alone Utility / Application
Copy Protection
Serial Number
My KVR - Groups, Versions, & More
26 KVR members have added MIDI Mutator to 21 My KVR groups 28 times.
Not In Your MY KVR Groups
(or group limitation prevents versioning)
+21 in private groups

KVR Rank

Overall: 4274   3332   4074

30-Day: 6972; 7-Day: 7990; Yesterday: 8633

MIDI Mutator is a collection of tools to modify any aspect of a MIDI sequence: rhythm, timing, accents, chords & voicings, and shape. Designed for modern and pop music producers.

Available for Windows (VST, VST3) and macOS (VST, VST3, AU) with native Apple Silicon support.


  • Regenerate the rhythm using 6 rhythm generator algorithms from RapidComposer, plus a new one that preserves exact note and rest lengths, suitable for modern genres.
  • Use rhythm from another MIDI file.
  • Slice a pattern, then rearrange slices randomly.
  • Displace notes randomly, randomize note positions and/or lengths.
  • Extend, widen, randomize chord voicings, replace the chord progression.
  • Change the beat positions to change the feel.
  • Replace or randomize accents.
  • Increase/decrease polyphony.
  • Randomize pitches.
  • For monophonic phrases: change the contour, add connecting notes.
  • Simple activation. No internet connection is required for activation or operation.

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