AudioContext interface represents an audio-processing graph built from audio modules linked together, each represented by an
An audio context controls both the creation of the nodes it contains and the execution of the audio processing, or decoding. You need to create an
AudioContext before you do anything else, as everything happens inside a context. It's recommended to create one AudioContext and reuse it instead of initializing a new one each time, and it's OK to use a single
AudioContext for several different audio sources and pipeline concurrently.
Creates and returns a new
Also inherits properties from its parent interface,
Returns the number of seconds of processing latency incurred by the
AudioContextpassing the audio from the
AudioDestinationNodeto the audio subsystem.
Returns an estimation of the output latency of the current audio context.
AudioContext.sinkIdRead only Experimental
Returns the sink ID of the current output audio device.
Also inherits methods from its parent interface,
Closes the audio context, releasing any system audio resources that it uses.
MediaElementAudioSourceNodeassociated with an
HTMLMediaElement. This can be used to play and manipulate audio from
MediaStreamAudioSourceNodeassociated with a
MediaStreamrepresenting an audio stream which may come from the local computer microphone or other sources.
MediaStreamAudioDestinationNodeassociated with a
MediaStreamrepresenting an audio stream which may be stored in a local file or sent to another computer.
MediaStreamTrackAudioSourceNodeassociated with a
MediaStreamrepresenting an media stream track.
Returns a new
AudioTimestampobject containing two audio timestamp values relating to the current audio context.
Resumes the progression of time in an audio context that has previously been suspended/paused.
Sets the output audio device for the
Suspends the progression of time in the audio context, temporarily halting audio hardware access and reducing CPU/battery usage in the process.
Fired when the output audio device (and therefore, the
AudioContext.sinkId) has changed.
Basic audio context declaration:
const audioCtx = new AudioContext(); const oscillatorNode = audioCtx.createOscillator(); const gainNode = audioCtx.createGain(); const finish = audioCtx.destination; // etc.
|Web Audio API |
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