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RIDDIM MUTATOR

A rule-based two-bar reggae pattern transformer that moves a riddim between ONE DROP, ROCKERS, STEPPERS, EARLY DIGITAL, ROOTS and UK DUB forms.

This is not a random step scatterer. It places the target kick and rim core first, then varies hats, percussion, bass, skank and bubble according to amount and seed. Lock any track that must stay unchanged.

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RIDDIM MUTATOR interface
RIDDIM MUTATOR running in the browser

When this helps

This is not a random step scatterer. It places the target kick and rim core first, then varies hats, percussion, bass, skank and bubble according to amount and seed. Lock any track that must stay unchanged.

What this browser tool does

A rule-based two-bar reggae pattern transformer that moves a riddim between ONE DROP, ROCKERS, STEPPERS, EARLY DIGITAL, ROOTS and UK DUB forms.

First five steps

  1. Choose a BEFORE form or load JSON from RIDDIM SEQUENCER.
  2. Choose ROCKERS, STEPPERS, ROOTS, EARLY DIGITAL, UK DUB or STRIPPED DUB.
  3. Lock the tracks you want to keep, then set amount and key.
  4. Press MUTATE and compare BEFORE with AFTER.
  5. Promote AFTER for another pass or export MIDI and JSON.

Basic controls

ORIGINAL / MUTATION

Choose the source form on the left and the destination form on the right. Core kick and rim positions change first.

AMOUNT / SEED / KEY

Amount controls how strongly supporting tracks change. The same seed repeats the result, and key affects playback and MIDI.

KEEP TRACKS

A locked track bypasses mutation. Use it to preserve the bass, kick or any defining part.

BEFORE / AFTER

Compare both versions, then send AFTER back to BEFORE when you want another mutation pass.

Practical setups

ONE DROP to ROCKERS

Start from ONE DROP and choose ROCKERS to hear the added first-beat kick around the retained drop.

STEPPERS to UK DUB

Choose UK DUB around fifty-five percent and leave hats and percussion unlocked to open more space.

Strip the same form

Lock BASS and RIM, choose STRIPPED DUB and lower the amount if too much disappears.

Save and export

MIDI exports the AFTER version. JSON stores BEFORE, AFTER, locks, amount, seed and key. RIDDIM SEQUENCER JSON can also be loaded as the source.

What this tool does not do

  • This tool focuses on one sound or pattern task rather than final mixing.
  • Keep output level conservative before pushing feedback, drive or repeated effects.

FAQ

Is it free?
RIDDIM MUTATOR is free to use in the browser.
Do I need to install anything?
No. Open the tool in a current browser to start.
Can I save or export the result?
MIDI exports the AFTER version. JSON stores BEFORE, AFTER, locks, amount, seed and key. RIDDIM SEQUENCER JSON can also be loaded as the source.
What should I try first if it does not work?
Unlock the track you want to change before raising amount.

Troubleshooting

  • Unlock the track you want to change before raising amount.
  • Press ANOTHER VERSION to advance the seed.
  • Assign drum, bass and organ sounds after importing MIDI into a DAW.
  • Leave KICK and RIM unlocked when the destination form should replace the rhythmic core.

Next tools

  • How to use DUB SIREN DECKA browser-based dub siren with oscillator, ZAP, LFO, filter, echo, reverb, built-in riddims and recording in one performance deck.
  • How to use CHIP SIREN 8An 8-bit siren machine with four tracks, a 16-step sequencer, chip voices, live FIRE and BURST pads, echo and browser recording.
  • How to use DUB SIREN CLASSICA focused dub siren interface for waveform, LFO, ZAP, filter, echo, reverb, hold effects, BPM looping and recording.

OPEN RIDDIM MUTATOR

Start from one preset or one pattern, then adjust only the part you can hear changing.

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