Beatline
A step sequencer with eight synthesized drum voices — build a beat in the browser and export it as a WAV.
Running here in the page — the same app the desktop opens.
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Sixteen steps across eight voices — kick, snare, hats, clap, tom, rim, cowbell — each built from oscillators and noise rather than samples, so the whole thing is a few kilobytes and needs no files. Click the grid to place hits, set the tempo and swing, mute and level each voice, and the playhead runs the pattern on a look-ahead scheduler so the timing stays tight.
Patterns save to your browser and copy to a short share string you can paste back later. When a loop is worth keeping, export it as a WAV rendered offline from the same voices. Everything runs on your machine; nothing is uploaded.
What people open it for
- Sketching a drum pattern without opening a DAW
- Exporting a loop as a WAV to drop into a track
- Learning how drum sounds are built from oscillators and noise