A 16-step drum and melody sequencer. Select a track on the left, tap squares to toggle steps on or off, then press play. Each loop slot stores a different pattern — chain them to build a full arrangement.

How to use the sequencer

The sequencer is a 16-step loop machine — the most common tool in electronic music production. Each of the 16 squares represents one sixteenth note: a beat subdivided into four equal parts, so four squares make up one beat and sixteen squares make one complete bar of 4/4 time. When you press play, a highlight moves through the squares from left to right, triggering any step that is switched on as it passes.

Tracks

The left column lists eight tracks: four rhythmic (Kick, Snare, Hi-Hat, Cymbal) and four melodic (Bass, Lead 1, Lead 2, Lead 3). Only one track is active at a time — click a track name to select it, then tap squares to turn steps on or off. The grid always shows the pattern for the selected track; when you play, all eight tracks run simultaneously.

A good starting point is the example beat, which loads a classic 4-on-the-floor kick pattern, snare on beats 2 and 4, and eighth-note hi-hats. Press play to hear it, then click each track in turn to understand what each layer is contributing.

Rhythm tracks

The four rhythm tracks — Kick, Snare, Hi-Hat, Cymbal — are on/off: a step is either active or silent. The most fundamental drum pattern in 4/4 time places a kick on steps 1, 5, 9, and 13 (the four beats), a snare on steps 5 and 13 (beats 2 and 4), and hi-hats on every other step. From this foundation you can add, remove, or shift any step to create syncopation — rhythmic interest that pushes against or between the beats.

Melody tracks

The melodic tracks work slightly differently. When you tap an empty step, it turns on and a small menu appears showing the available notes from your chosen scale. Tap a note name to assign it. If you tap a step that is already on, the menu reopens so you can change the note or turn the step off. The key and scale selectors in the transport bar determine which notes are available.

The five scale options cover the most useful sounds in Western music. Major is bright and resolved. Natural minor is darker and more melancholic. Minor pentatonic is particularly forgiving: almost any combination of steps sounds musical, which makes it ideal for improvising ideas quickly. Harmonic minor adds a raised seventh that gives a tense, dramatic quality.

Loop slots and chaining

The sequencer has four loop slots, each storing a completely independent set of patterns across all eight tracks. The copy button duplicates the current loop to the next slot. The chain section lets you combine loops into an arrangement — choose a loop and a repeat count, then add it to the chain. Export WAV renders the result as a stereo audio file.