Matrix — Step Sequencer

Click cells on the grid to lay down notes. Each row is a different pitch (C major pentatonic, so no wrong notes). Each column is a 16th-note step. The playhead loops left to right.

Controls

Click

Toggle a cell on or off

Drag

Paint multiple cells at once

Play

Start / stop the loop

Space

Same as Play

Tempo

Slide between 40 and 240 BPM

Clear

Wipe the grid

Share

Copy a URL that contains your pattern

About

Inspired by Andre Michelle’s ToneMatrix and lupine-dev’s ToneMatrix Redux. Built from scratch in vanilla JS + Web Audio for this site.