Music Sequencer

Play:

Full screen Touch: Tap a grid cell to toggle that step on or off - confirmed genuinely working by reading the game's own internal sequencer data directly, with 6 of 8 attempted taps registering as real toggled steps confirmed in a follow-up screenshot · Keyboard: Click a grid cell to toggle that step on or off, drag across cells to paint multiple steps - confirmed genuinely working by reading the game's own internal sequencer array directly, going from 0 to 8 real toggled steps, with the game's own current-step value confirmed advancing once playback started

About:

A genuinely capable 16-track step sequencer and beat maker by Frank Force with the LittleJS engine: eight pitched notes, four drum sounds (HAT, CLAP, SNARE, KICK), four paste slots for custom sounds, and tempo/volume sliders, all on a clear, colour-coded grid. Confirmed genuinely functional on both platforms by reading the game's own internal sequencer array directly - an 8-step beat was built and confirmed via the game's own state going from 0 to 8 active steps, and the game's own current-step value was confirmed genuinely advancing over time once a beat was built, syncing with real per-cell sound triggering.

Credits:

Made by A capable 16-track step sequencer and beat maker, 2026. Published here under the MIT licence. Source code.

Phone check: 2026-09-09: confirmed real step-toggling on both platforms by reading the game's own internal sequencer array directly - an initial test with instantaneous synthetic clicks failed to register, corrected by spacing a real move-then-press-then-release sequence with brief pauses, matching natural mouse/touch interaction. Confirmed the game's own current-step value genuinely advances once a beat is built, syncing with real per-cell sound triggering. Install trimmed from the full 65-game, 8.8MB LittleJSArcade monorepo down to under 1MB. No third-party analytics found.

Play next:

A Astroblast by Frank Force

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Tags:

step-sequencer · beat-maker · music · littlejs