A stage of OSC-1. It works the same on its own page as it does in the chain — same parameters, same paths.
Crush
Bit depth, sample rate, and bad decisions.
Audio and MIDI
Browser session
Audio is stopped.
Input · MIDI keyboard
Your keyboard is a keyboard. Middle row plays the white notes, top row the black ones. Z and X change octave. Keys are ignored while you are typing in a field.
Crush
Bitcrusher and oversampled waveshaper with quality tiers, from subtle grit to full collapse. Doubles as the bitCrusher stage of the OSC-1 chain.
Parameters
Crush
These knobs move the module's published schema, but the preview engine only renders OSC Mini, FX Mini and the OSC-1 chain — so they won't change what you hear yet.
Output · Audio signal
The signal leaving Crush, tapped after the output stage. It's a picture of what your speakers are getting.
About
Bitcrusher and oversampled waveshaper with quality tiers, from subtle grit to full collapse. Doubles as the bitCrusher stage of the OSC-1 chain.
Take it into your DAW.
Same DSP as this page. The plugin isn't a rebuild — it's the identical kernel from the identical TypeScript source, compiled native instead of to WASM.
Free forever, no account, and playing it in the browser will never ask you for one. VST3 and standalone today; AU and CLAP are on the roadmap.
Every knob, and what it actually does.
Generated from the module's parameter schema — the same source as the web UI, the worklet transport and the VST3 parameter table, so it cannot drift.
| Param | Range | Default | Units | What it does | Automatable |
|---|---|---|---|---|---|
| Crush | |||||
Bitscrush.bits | 1 … 16 | 4 | — | Quantisation depth. 16 is transparent, 8 sounds like a sampler from 1987, 1 is a square wave with opinions. | Yes (stepped) |
Mixcrush.wet | 0 … 1 | 0.5 | — | Blend of crushed against clean. | Yes |
Parameter paths (filter.cutoff) are what you'll see in your DAW's automation list and in the SDK. Same names everywhere.
How it works.
Quantises each sample to 2^Bits levels and mixes the result against the dry signal. The distortion is the quantisation error, which is why it sounds granular rather than warm - it is not a saturation curve, it is arithmetic being deliberately careless.
There is no rate decimation in the preview build; Bits is the only crushing axis here. The published schema keeps the name so the eventual kernel drops in without renaming anything.
It's yours to read and to fork.
Research preview
npx codex clone crush
npm run devThe codex CLI name is proposed, not shipped. That command gives you this module's DSP, schema, presets and UI as a local project — change a number, hear it immediately.