GitHub Repository

A browser-based generative music sequencer built with JavaScript and Tone.js, designed for live performance and composition.

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Browser based sythesizer, drum machine and squencer

Name: Browser based sythesizer, drum machine and squencer
Availability: InStock
Author: madmonk

by madmonk·May 15, 2026·22 points·4 comments

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AI Analysis

●●●BangerCozyRabbit Hole

Single-file generative sequencer with harmonic drift that actually outputs a full album.

Strengths

•Harmonic drift and probabilistic rules generate musically coherent patterns automatically.
•Script recording captures parameter changes as replayable JSON event logs.
•Zero build step or server requirements; runs entirely in a single HTML file.

Weaknesses

•Lo-fi synth voices lack the depth of dedicated VSTs like Serum or Massive.
•No collaboration features for sharing patterns beyond exporting audio files.

Post Description

Inspired by the recent Boards Of Canada announcement, I've been in a low-fi electronica mood lately and was going back and forth with Claude on how to design similar instruments in the browser that fit the genre. One thing led to another and pretty soon I had a fully browser based polyphonic synthesizer / drum machine / sequencer.

The interface and workflow was heavily inspired by the Rebirth338 application released back in the 90's, but with lo-fi synth voices rather than the original 303 & 808 emulation.

I know there's a significant overlap of developers and musicians and I though some of you may enjoy playing with the app, or at least listening to the resulting album. I've also open sourced track 1 of the album via the performance script used to record it. It's in the repo.

Bandcamp link to the resulting album: https://madmonk13.bandcamp.com/album/yesterdays-tomorrow-tod...