π΅ Web Audio Synthesizer Zero Dependencies Β· Offline
Free online Web Audio synthesizer. 4 waveforms, filter, ADSR envelope control, real-time waveform visualization, one-click code generation. Pure frontend.
What Can the Web Audio Synthesizer Do?
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.
Core Features
- 4 Waveforms: Sine, square, sawtooth, and triangle covering common timbre needs
- Filters: Lowpass, highpass, bandpass, and notch with adjustable cutoff and Q
- ADSR Envelope: Full Attack-Decay-Sustain-Release control
- Chord Playback: One-click major triad generation with custom base frequency
- Waveform Visualization: Real-time audio waveform display
- Code Generation: Export Web Audio API code for direct project integration
How to Use
- Choose waveform: Select based on desired timbre
- Set frequency: Adjust pitch (440Hz = A4)
- Configure filter: Select filter type and parameters
- Adjust ADSR: Set attack, decay, sustain, and release
- Play and listen: Click Play Note or Play Chord to hear the result
- Export code: Copy generated Web Audio code to your project
Use Cases
Web Audio Learning
Visually understand Web Audio API concepts β oscillators, filters, envelopes β with real-time parameter adjustment.
Game Sound Effects
Quickly design game sound effect parameters and generate code for direct integration into web games.
Music App Development
Use as a base synthesizer module for web music applications with reusable audio code.
Technical Background
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.
β FAQ
What is the Web Audio API?
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.
What waveform types are supported?
4 basic waveforms: sine (pure tone), square (8-bit style), sawtooth (bright tone), and triangle (soft tone). Different waveforms produce different timbral characteristics.
What is ADSR envelope?
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.
What does the filter do?
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.
Can I export audio files?
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.
How does the chord feature work?
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.