webaudio-examples

Code examples that accompany the MDN Web Audio documentation https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API

Audio analyser

The audio-analyser directory contains a very simple example showing a graphical visualization of an audio signal drawn with data taken from an AnalyserNode interface. Run the demo live.

Audio basics

The audio-basics directory contains a fun example showing a retro-style "boombox" that allows audio to be played, stereo-panned, and volume-adjusted. Run the demo live.

Audio buffer

The audio-buffer directory contains a very simple example showing how to use an AudioBuffer interface in the Web Audio API. Run the demo live.

Audio param

The audio-param directory contains some simple examples showing how to use the methods of the Web Audio API AudioParam interface. Run example live.

Audio context states

The audiocontext-states directory contains a simple demo of the new Web Audio API AudioContext methods, including the states property and the close(), resume(), and suspend() methods. Run the demo live.

Compressor example

The compressor-example directory contains a simple demo to show usage of the Web Audio API BaseAudioContext.createDynamicsCompressor() method and DynamicsCompressorNode interface. Run the example live.

Create media stream destination

The create-media-stream-destination directory contains a simple example showing how the Web Audio API AudioContext.createMediaStreamDestination() method can be used to output a stream - in this case to a MediaRecorder instance - to output a sinewave to an opus file. Run the demo live.

Decode audio data

The decode-audio-data directory contains a simple example demonstrating usage of the Web Audio API BaseAudioContext.decodeAudioData() method. View example live.

IIR filter node

The iirfilter-node directory contains an example showing usage of an IIRFilterNode interface. Run the demo live.

Media source buffer

The media-source-buffer directory contains a simple example demonstrating usage of the Web Audio API AudioContext.createMediaElementSource() method. View the demo live.

Multi track

The multi-track directory contains an example of connecting separate independently-playable audio tracks to a single AudioDestinationNode interface. Run the example live.

Offline audio context

The offline-audio-context directory contains a simple example to show how a Web Audio API OfflineAudioContext interface can be used to rapidly process/render audio in the background to create a buffer, which can then be used in any way you please. For more information, see https://developer.mozilla.org/en-US/docs/Web/API/OfflineAudioContext. Run example live.

Offline audio context promise

The offline-audio-context-promise directory contains a simple example to show how a Web Audio API OfflineAudioContext interface can be used to rapidly process/render audio in the background to create a buffer, which can then be used in any way you please. Run the example live.

Output timestamp

The output-timestamp directory contains an example of how the AudioContext.getOutputTimestamp() property can be used to log contextTime and performanceTime to the console. Try the demo live.

Panner node

The panner-node directory contains a demo to show basic usage of the Web Audio API BaseAudioContext.createPanner() method to control audio spatialization. Run the example live.

Script processor node

The script-processor-node directory contains a simple demo showing how to use the Web Audio API's ScriptProcessorNode interface to process a loaded audio track, adding a little bit of white noise to each audio sample. See the live demo.

Spacialization

The spacialization directory contains an example of how the various properties of a PannerNode interface can be adjusted to emulate sound in a three-dimensional space. For more information see Web audio spatialization basics. Try the live demo.

Step sequencer

The step-sequencer directory contains a simple step-sequencer that loops and manipulates sounds based on a dial-up modem. For more information see Advanced techniques: creating sound, sequencing, timing, scheduling. See the live demo also.

Stereo panner node

The stereo-panner-node directory contains a simple example to show how the Web Audio API StereoPannerNode interface can be used to pan an audio stream. Run the example live.

Stream source buffer

The stream-source-buffer directory contains a simple example demonstrating usage of the Web Audio API AudioContext.createMediaElementSource() method. View example live.