Free online Web Audio synthesizer. 4 waveforms, filter, ADSR envelope control, real-time waveform visualization, one-click code generation. Pure frontend.
The Web Audio Synthesizer is a free online tool built on the Web Audio API for browser-based audio synthesis. 4 waveforms, filter, ADSR envelope, real-time waveform visualization, and one-click code generation. Pure frontend.
Visually understand Web Audio API concepts — oscillators, filters, envelopes — with real-time parameter adjustment.
Quickly design game sound effect parameters and generate code for direct integration into web games.
Use as a base synthesizer module for web music applications with reusable audio code.
The Web Audio API is a powerful audio processing framework in modern browsers. AudioContext is the core object; various AudioNodes (OscillatorNode, BiquadFilterNode, GainNode, etc.) connect via connect() to form processing graphs. ADSR envelopes originate from analog synthesizers and are a core sound design concept. The API also supports ConvolverNode (reverb), DelayNode (delay), and DynamicsCompressorNode (compression) for advanced effects.
The Web Audio API is a browser audio processing interface that supports audio generation, processing, and analysis. You can create oscillators, filters, gain nodes, and build complex audio processing graphs. All processing happens locally in the browser.
4 basic waveforms: sine (pure tone), square (8-bit style), sawtooth (bright tone), and triangle (soft tone). Different waveforms produce different timbral characteristics.
ADSR stands for Attack (onset time), Decay (fall time), Sustain (hold level), and Release (fade time). It controls the volume curve of a sound from start to end.
Filters change the frequency content of sound. Lowpass removes highs for a darker sound, highpass removes lows for brightness, bandpass keeps only a specific frequency range. Q controls resonance intensity.
The current version generates Web Audio API code for real-time browser playback. Exporting WAV files requires MediaRecorder API to record AudioContext output, which this tool doesn't support yet.
Click 'Play Chord' to generate a major triad (root + major third + perfect fifth) based on the current frequency. Adjust the base frequency to change the chord pitch.