Why it exists

Live coding music has always been a superpower locked behind environment setup: Haskell, SuperCollider, installation rituals. Strudel — TidalCycles' pattern language reimagined for the browser — removes every barrier: open a page, get a REPL with samples, synthesis, effects and a step-sequencing pattern system that would take days to wire up by hand. It's equal parts instrument, education tool and art form; the site's tutorials start at "hello world" and climb to polyrhythmic breakcore, and every lesson is audible rather than theoretical.

Main features

• Mini-notation patterns — TidalCycles' signature "bd sd [hh hh*2] cp" rhythm syntax, with tempo, cycles and time-correct looping.
• Samples & synthesis — a large built-in sample bank (drums, instruments, found sounds) plus sawtooth/square/sine synths and filters, all via Web Audio.
• Effects chain — reverb, delay, distortion, filters, bitcrush, panning, envelopes — composable per-pattern.
• Scales & harmony helpers — notes, chords, scales and arpeggio helpers so musical theory is one function away.
• Visuals — waveforms and pattern visualization rendered alongside the code; performance-friendly.
• REPL with tutorials — editable, runnable examples embedded in the docs; Ctrl+Enter and you hear it.
• Ableton Link & MIDI — jam with hardware/DAW setups from the browser.

Who it's for

• Musicians and producers curious about algorithmic patterns without buying into a DAW religion.
• Teachers who want to sneak math, rhythm and programming into one irresistible lesson.
• Algorave performers and creative coders who want a portable, zero-install instrument.
• JavaScript developers who'd enjoy hearing their day job.

How it compares

• TidalCycles (Haskell) — the original and still more powerful; Strudel is its friendlier, browser-native sibling with the same pattern DNA.
• Sonic Pi — the education classic for Ruby-friendly schools; Strudel needs zero installation and runs on a Chromebook.
• Gibber / FoxDot — other live-coding environments; Strudel's mini-notation is the most concise pattern language of the lot.
• DAWs (Ableton & co.) — infinite production power, heavyweight cost; Strudel is the sketchbook next to the studio.

Notes

• Everything runs locally in your browser (Web Audio); the editor state lives in the URL, so patterns are shareable as links.
• AGPL-3.0, backed by the TidalCycles community; active development and a friendly Discord.
• Great on headphones; audio APIs on iOS Safari are usable but a laptop is the reliable stage.
• Start with the interactive tutorial on the site — ten minutes from zero to your first loop.

Useful links

• Official site (REPL + tutorials): https://strudel.cc/
• Source code: https://github.com/tidalcycles/strudel
• TidalCycles (the Haskell original): https://tidalcycles.org/
• Community (Discord/Mastodon links on the site)