BaseAudioContext

The BaseAudioContext interface acts as a base definition for online and offline audio-processing graphs, as represented by AudioContext and OfflineAudioContext respectively.

Documentation BaseAudioContext by Mozilla Contributors, licensed under CC-BY-SA 2.5.

Instance Members #

Returns an AudioDestinationNode representing the final destination of all audio in the context. It can be thought of as the audio-rendering device.

Returns a float representing the sample rate (in samples per second) used by all nodes in this context. The sample-rate of an AudioContext cannot be changed.

Returns a double representing an ever-increasing hardware time in seconds used for scheduling. It starts at 0.

Returns the AudioListener object, used for 3D spatialization.

Returns the current state of the AudioContext.

An event handler that runs when an event of type statechange has fired. This occurs when the AudioContext's state changes, due to the calling of one of the state change methods (AudioContext.suspend, AudioContext.resume, or AudioContext.close).

Resumes the progression of time in an audio context that has previously been suspended/paused.

Creates a new, empty AudioBuffer object, which can then be populated by data and played via an AudioBufferSourceNode.

Asynchronously decodes audio file data contained in an ArrayBuffer. In this case, the ArrayBuffer is usually loaded from an XMLHttpRequest's response attribute after setting the responseType to arraybuffer. This method only works on complete files, not fragments of audio files.

Creates an AudioBufferSourceNode, which can be used to play and manipulate audio data contained within an AudioBuffer object. AudioBuffers are created using AudioContext.createBuffer or returned by AudioContext.decodeAudioData when it successfully decodes an audio track.

Creates a ConstantSourceNode object, which is an audio source that continuously outputs a monaural (one-channel) sound signal whose samples all have the same value.

Creates a ScriptProcessorNode, which can be used for direct audio processing via JavaScript.

Creates an AnalyserNode, which can be used to expose audio time and frequency data and for example to create data visualisations.

Creates a GainNode, which can be used to control the overall volume of the audio graph.

Creates a DelayNode, which is used to delay the incoming audio signal by a certain amount. This node is also useful to create feedback loops in a Web Audio API graph.

Creates a BiquadFilterNode, which represents a second order filter configurable as several different common filter types: high-pass, low-pass, band-pass, etc

Creates an IIRFilterNode, which represents a second order filter configurable as several different common filter types.

Creates a WaveShaperNode, which is used to implement non-linear distortion effects.

Creates a PannerNode, which is used to spatialise an incoming audio stream in 3D space.

Creates a StereoPannerNode, which can be used to apply stereo panning to an audio source.

Creates a ConvolverNode, which can be used to apply convolution effects to your audio graph, for example a reverberation effect.

Creates a ChannelSplitterNode, which is used to access the individual channels of an audio stream and process them separately.

Creates a ChannelMergerNode, which is used to combine channels from multiple audio streams into a single audio stream.

Creates a DynamicsCompressorNode, which can be used to apply acoustic compression to an audio signal.

Creates an OscillatorNode, a source representing a periodic waveform. It basically generates a tone.

Creates a PeriodicWave, used to define a periodic waveform that can be used to determine the output of an OscillatorNode.