LIBSONARE
Synth PlaygroundPlay libsonare's native polyphonic synth, live in the browser
LOCAL ONLY
v-.-.--DocsJAGet Started
OSS DEMO

Everything runs locally on your device and nothing is sent anywhere. This is an open-source demo, not a service.

Idle
Peak-∞ dBEngine-
Native polyphonic synthesis, in the browser

Every key plays through libsonare's NativeSynth hosted in a SAB-free AudioWorklet: notes become live MIDI events, and the engine renders a stereo bus in the audio thread with its own WebAssembly heap. Hold several keys for full polyphony.

Realtime Engine docs
LIBSONARENS-1NATIVE POLYPHONIC SYNTHESIZER Power
e-piano-∞ dB

Program

Oscillator

Filter

Cutoff
16.0 kHz
Resonance
0.70

Envelope

Attack
1 ms
Release
224 ms

Voice

Glide
0 ms
Width
0%

Output

Gain
90%
Octave
C3
Z / X

Click or tap the keys, or play with your computer keyboard: A W S E D F T G Y H U J K. Use Z / X to shift the octave. Drag across keys for glissando — striking lower on a key plays louder.

MIDI In MIDI input docs