Live Playground
The playground is a full polyphonic synthesizer running Quiver’s actual WASM engine
— the same compiled Rust that ships in the @quiver-dsp/wasm
npm package. Nothing is emulated: the patch graph is compiled and ticked sample-by-sample
inside an AudioWorklet on the audio render thread.
What you can do there:
- Play it — click Initialize Audio, then use your computer keyboard (A–K for white keys, WETYU for black keys), the on-screen keys, or a connected MIDI controller.
- Shape the voice — a 4-voice subtractive patch (VCO → SVF → VCA with ADSR and chorus) with live controls for waveform, pulse width, detune, cutoff, resonance, envelope amount, ADSR times, and chorus.
- Watch it — oscilloscope, Lissajous (stereo phase), bar, and spectrum views, plus per-channel VU meters, all tapped from the worklet’s output.
- Save and load patches — the same JSON patch format
the Rust library reads and writes (
schemas/patch.schema.json). - Browse the module catalog — every module the WASM build exposes, with its ports and signal types, queried live from the engine’s registry.
How it relates to the Explorables
The Explorables are small, instant-loading JavaScript mirrors of individual DSP algorithms — built for understanding one idea at a time. The playground is the opposite end of the spectrum: the complete engine, compiled from the Rust source, patched and played in real time. When you want to check that what you learned holds up in the real thing, this is where you go.
Running it locally
The playground is the browser demo in demos/browser:
make browser-synth # builds the WASM package and starts a dev server on :3000
See Browser & App Integration for using the same engine in your own app.