v1.2 — a browser-based synth and drum machine, also available as a Mac app.

⤓ DOWNLOAD THE FULL MANUAL (PDF)

Playing Notes

Click the piano keys to play, or plug in a USB MIDI keyboard. The ribbon strip above the keyboard bends your pitch — slide it and it holds wherever you leave it, rather than snapping back.

Drum Sequencer

Click any square in the step grid to turn that drum hit on or off, then hit PLAY. Each of the nine drum sounds has its own mute button, so you can drop sounds in and out live without losing the pattern underneath.

Arpeggiator

Turn on ARP HOLD and click a few keys — they'll stack into a chord instead of cutting out. Flip ARP ON and pick a pattern (Up, Down, Up/Down, or Random) to have those notes play themselves back in time with the beat.

The RATE knob sets how fast the arp steps through those notes, from 1/1 right down to 1/32. It runs on its own clock, so changing it leaves the drum sequencer exactly where it is — park the drums on a straight 1/8 groove and let the arp skitter along at 1/32 underneath, or drag it out to 1/2 for slow held stabs. Drag the knob up and down to move through the nine divisions; the gold readout shows where you are, and the caption beneath it tells you how the arp currently compares to the drum grid. Both keyboard rows feed the arp — white keys and black keys alike.

Drum FX

Under the sequencer, each drum gets three small knobs: REV adds reverb, DLY adds a tempo-synced echo, and SHP adds grit and drive. All three start off, so nothing changes until you turn them up.

Synth Sound

Pick an engine (SuperSaw, Moog Bass, or FM Lead) in the Arpeggiator row, just above the keys, then shape it with the Filter Bank, Envelope, and Colour knobs below the sequencer. The Effects section adds chorus, echo, and reverb to the whole synth.

Bass Sequencer

The bottom row of the step grid (marked Synth, in green) is a melodic track — each step has its own note dropdown, and OFF leaves a gap. BASS FX & ENG below gives that row its own engine choice and its own REV, SHP, and DLY knobs, so the bassline sits separately from whatever the live keyboard is doing.

Mixing

The MIXER panel has separate volume knobs for the synth and the drums, plus individual levels for kick, snare, and hat.

Getting Sounds Out

Hit EXPORT DRUM WAV to download your current drum pattern as a ready-to-use audio file. Or route the whole synth into Logic, Ableton, or any DAW using BlackHole, a free virtual audio driver.

Browser or Mac App

Everything here runs the same whether you're in a browser tab or the standalone Mac app — pick whichever fits your workflow.