Pattern-Based Music Composition

Inspired by ProTracker and FastTracker. Compose songs with patterns, samples, and effects — right in your browser. Free and open.

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BeatTracker pattern editor with channels, notes, and effects

A Tracker in Your Browser

Everything you loved about classic trackers, with modern convenience.

Pattern Editor

A familiar grid-based editor with keyboard-driven input. Notes, instruments, volumes, and effects per channel.

Samples & Instruments

Load samples and shape them with volume, finetune, and loop settings. Classic tracker workflow.

Effects & Commands

Arpeggio, portamento, vibrato, and more. The full set of tracker effects you know and love.

How It Works

1

Create a Song

Set your tempo, channels, and start with a blank pattern

2

Add Samples

Load audio samples to use as instruments

3

Compose Patterns

Enter notes, effects, and volumes row by row

4

Arrange & Share

Order your patterns into a song and share it

Start Tracking

Jump in and compose something. It's free and fun.

Get Started