idle.fm

Endless lofi and phonk radio, synthesized live in the browser with the Web Audio API. No audio files, no streams, no accounts, no tracking.

Run

It's a single static file. Open index.html in a browser, or serve the folder:

npx serve .

Press [ play ]. Browsers only allow audio to start after a click.

Stations

Genre	Station	BPM
lofi	chill	78
lofi	focus	70
lofi	jazzhop	88
lofi	3am	64
phonk	drift	130
phonk	memphis	84

[lofi] / [phonk] jump to a random station of that genre. [ skip ] generates a new track.

How it works

Everything lives in the Radio class in index.html:

• makeTrack() picks a key, chord progression, drum/bass patterns, melody and title from a random seed.
• tick() schedules the next quarter-second of notes every 30 ms. When a track's bars run out, it crossfades into a new one.
• kick(), snare(), epChord(), sub808(), cowbell()… build each sound from oscillators, filtered noise and gain envelopes.
• render() updates the DOM from state. Elements are bound with data-t, data-tune, data-genre and data-on attributes.

Deploy

Upload index.html to any static host (GitHub Pages, Netlify, Cloudflare Pages). There is no build step.