About Web Audio Experiment
Drag oscillators, filters, reverb units, and gain nodes onto a canvas, then wire them together to build your own signal chain from scratch. Every connection you make changes what you hear in real time — route a sawtooth wave through a low-pass filter, add a delay, tweak the cutoff frequency, and listen to the result immediately. There's no preset to lean on; the sound is entirely whatever you construct.
This is a hands-on introduction to how the music web works at a low level, using the Web Audio API as both engine and teacher. If you've ever been curious why synthesizers have patch cables, or what a convolver actually does to a signal, this app makes those concepts tangible fast.
If you prefer something more immediately playable after experimenting here, Violent Theremin puts a single mouse-controlled instrument in your hands with zero setup. Works best on a laptop or desktop — precise node placement on a small touchscreen gets fiddly quickly.
How to use
This is a visual tool for experimenting with Web Audio API to create and manipulate sound. • Click buttons in the left menu to add audio nodes (sound sources, effects, outputs) to the workspace • Drag nodes around the canvas to position them • Connect nodes by dragging from output ports to input ports to create an audio signal path • Click on any node to adjust its parameters in the bottom panel • Use play/stop buttons to start and stop audio playback • Set BPM for timing-based effects using the number input Basic audio chain: Add a sound source (Oscillator, Audio Buffer) → connect to processing nodes (Gain, Delay, Filters) → connect to your speakers (destination) • Save/Load buttons preserve your audio graph setups • Reset clears the workspace • Audio Buffers button manages audio file imports • Right-click nodes for additional options • Check the log panel for any error messages Experiment by chaining different audio processing nodes to create unique sounds and effects.
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A browser theremin. Move your mouse to control pitch and volume, generating eerie continuous tones via the Web Audio API.
by mdn
