For Drummers. For Creators.
DrumStrum opens up chromatic musical choices to drummers in flexible, spontaneous ways. Run it standalone or alongside Ableton Live or any DAW.
Free trial · Mac & Windows · Teensy firmware
What is DrumStrum?
DrumStrum transforms incoming MIDI from drum controllers into chord-driven note streams. A keyboard or sequencer defines the chord; your drum pads trigger individual chord notes rhythmically — like a guitarist's fretting hand and strumming hand working together. The result is spontaneous, musical, and entirely yours.
DrumStrum was built by programmer and musician Bill Wolf (aka RoundingError). It comes from a 25+ year obsession with allowing drums to trigger melodic notes in expressive ways — not just canned sequences, but real-time harmonic choices driven by how you play.
No pre-programmed sequences. Every note is a live decision driven by your playing.
MIDI hardware and software agnostic. Works with whatever controllers and interfaces you already own.
Run standalone or in parallel with Ableton Live, Logic, or any DAW of your choice.
See it in action
Watch DrumStrum being played live — spontaneous, expressive, and wide open.
More on the DrumStrum YouTube channel.
Get DrumStrum
Try DrumStrum free. The trial version is fully functional — explore everything before you commit.
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