An online MIDI step sequencer and curve editor for hardware synths. Draw CC automation, sequence polyphonic chords, and route modular patches directly in your browser.
Interactive MIDI CC Maps & Editors.
Designed for hardware control.
Paint automation shapes directly on step tracks, map MIDI parameters, and evaluate dynamic equations (Sine, Saw, Random) to modulate hardware.
Quickly preview chord degrees, invert shapes, and paint complex structures in polyphonic tracks.
Sync local projects, authenticate securely, and access your sequencer settings and backups globally.
Clone sequencer patterns dynamically using diatonic transposition, retrograde reversal, step-gating, or analog-inspired Drunk drift.
Interactive browser-based lessons built around the sequencer. Follow slide-by-slide guides for rhythms, basslines, and synthesis — no DAW needed.
Master the foundational kick/snare pattern used in virtually every genre of modern music.
Build the iconic squelching 303-style bassline using step sequencing and filter automation.
Recreate the timeless four-on-the-floor house beat with open hi-hats and off-beat percussion.
Community lessons are created by users like you
✦ Create your own lesson →News & Release Notes
Introducing closeby.1 ACADEMY: Learn Music Production Hands-On in Your Browser For decades, learning music production and synthesizer sequencing has meant w...
Have you ever found yourself in the middle of a synth session, wanting your patch to sound "warmer", "denser", or "more like vintage analogue tape", but ende...
Have you ever wanted to trigger three different hardware synths from a single sequencer track—scaling the volume on synth 2 to 50% for background texture, wh...