Parameters
Tremolo
These knobs move the module's published schema, but the preview engine only renders a few modules so far — OSC Mini, FX Mini, Amp Rig, Space Mini and the OSC-1 chain — so they won't change what you hear yet.
Keyboard
Tremolo
Play the module directly — nothing to cue.
Tremolo
Volume, going up and down on purpose.
A stage of OSC-1. It works the same on its own page as it does in the chain — same parameters, same paths.
About
Amplitude modulation with rate, depth and a stereo phase offset. The oldest effect on the list and still the one that turns a held chord into a part.
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.
How it works.
A sine LFO at Rate scales the signal level between 1 and 1 minus Depth. Spread offsets the right channel's LFO phase, so at 180 degrees the two channels trough alternately and the effect reads as movement across the stereo field rather than pumping.
Ported from the plugin's tremolo, including the pass-through-when-disabled behaviour: the LFO keeps running while the stage is bypassed, so re-enabling it does not restart the cycle from zero.
It's yours to read and to fork.
Research preview
npx codex clone tremolo
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.