BaseAudioContext

BaseAudioContext interface of the Web 音频 API acts as a base definition for online and offline audio-processing graphs, as represented by AudioContext and OfflineAudioContext 分别。 You wouldn't use BaseAudioContext directly — you'd use its features via one of these two inheriting interfaces.

A BaseAudioContext can be a target of events, therefore it implements the EventTarget 接口。

特性

BaseAudioContext.audioWorklet 只读 Secure context
返回 AudioWorklet object, which can be used to create and manage AudioNode s in which JavaScript code implementing the AudioWorkletProcessor interface are run in the background to process audio data.
BaseAudioContext.currentTime 只读
Returns a double representing an ever-increasing hardware time in seconds used for scheduling. It starts at 0 .
BaseAudioContext.destination 只读
Returns an AudioDestinationNode representing the final destination of all audio in the context. It can be thought of as the audio-rendering device.
BaseAudioContext.listener 只读
返回 AudioListener object, used for 3D spatialization.
BaseAudioContext.sampleRate 只读
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.
BaseAudioContext.state 只读
Returns the current state of the AudioContext .

事件处理程序

BaseAudioContext.onstatechange
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 ,或 AudioContext.close ).

方法

Also implements methods from the interface EventTarget .

BaseAudioContext.createAnalyser()
创建 AnalyserNode , which can be used to expose audio time and frequency data and for example to create data visualisations.
BaseAudioContext.createBiquadFilter()
创建 BiquadFilterNode , which represents a second order filter configurable as several different common filter types: high-pass, low-pass, band-pass, etc
BaseAudioContext.createBuffer()
Creates a new, empty AudioBuffer object, which can then be populated by data and played via an AudioBufferSourceNode .
BaseAudioContext.createBufferSource()
创建 AudioBufferSourceNode , which can be used to play and manipulate audio data contained within an AudioBuffer 对象。 AudioBuffer s are created using AudioContext.createBuffer or returned by AudioContext.decodeAudioData when it successfully decodes an audio track.
BaseAudioContext.createConstantSource()
创建 ConstantSourceNode object, which is an audio source that continuously outputs a monaural (one-channel) sound signal whose samples all have the same value.
BaseAudioContext.createChannelMerger()
创建 ChannelMergerNode , which is used to combine channels from multiple audio streams into a single audio stream.
BaseAudioContext.createChannelSplitter()
创建 ChannelSplitterNode , which is used to access the individual channels of an audio stream and process them separately.
BaseAudioContext.createConvolver()
创建 ConvolverNode , which can be used to apply convolution effects to your audio graph, for example a reverberation effect.
BaseAudioContext.createDelay()
创建 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.
BaseAudioContext.createDynamicsCompressor()
创建 DynamicsCompressorNode , which can be used to apply acoustic compression to an audio signal.
BaseAudioContext.createGain()
创建 GainNode , which can be used to control the overall volume of the audio graph.
BaseAudioContext.createIIRFilter()
创建 IIRFilterNode , which represents a second order filter configurable as several different common filter types.
BaseAudioContext.createOscillator()
创建 OscillatorNode , a source representing a periodic waveform. It basically generates a tone.
BaseAudioContext.createPanner()
创建 PannerNode , which is used to spatialise an incoming audio stream in 3D space.
BaseAudioContext.createPeriodicWave()
创建 PeriodicWave , used to define a periodic waveform that can be used to determine the output of an OscillatorNode .
BaseAudioContext.createScriptProcessor()
创建 ScriptProcessorNode , which can be used for direct audio processing via JavaScript.
BaseAudioContext.createStereoPanner()
创建 StereoPannerNode , which can be used to apply stereo panning to an audio source.
BaseAudioContext.createWaveShaper()
创建 WaveShaperNode , which is used to implement non-linear distortion effects.
BaseAudioContext.decodeAudioData()
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.

范例

Basic audio context declaration:

const audioContext = new AudioContext();
					

Cross browser variant:

const AudioContext = window.AudioContext || window.webkitAudioContext;
const audioContext = new AudioContext();
const oscillatorNode = audioContext.createOscillator();
const gainNode = audioContext.createGain();
const finish = audioContext.destination;
					

规范

规范 状态 Comment
Web 音频 API
The definition of 'BaseAudioContext' in that specification.
工作草案

浏览器兼容性

更新 GitHub 上的兼容性数据
Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
BaseAudioContext Chrome Yes Edge ≤18 Firefox 53 IE 不支持 No Opera 22
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Safari iOS 6
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Samsung Internet Android Yes
audioWorklet
Chrome 66 Edge 79 Firefox ? IE 不支持 No Opera Yes Safari 不支持 No WebView Android 66 Chrome Android 66 Firefox Android ? Opera Android Yes Safari iOS 不支持 No Samsung Internet Android 9.0
createAnalyser Chrome 10
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10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Safari 6
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WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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createBiquadFilter Chrome 10
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IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Opera Android 22
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createBuffer Chrome 10
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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createBufferSource Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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Samsung Internet Android 2.0
createChannelMerger Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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15
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Safari iOS 6
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Samsung Internet Android 2.0
createChannelSplitter Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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Samsung Internet Android 2.0
createConstantSource Chrome 56 Edge ≤79 Firefox 53 IE 不支持 No Opera 43 Safari 不支持 No WebView Android 56 Chrome Android 56 Firefox Android 53 Opera Android 43 Safari iOS 不支持 No Samsung Internet Android 6.0
createConvolver Chrome 10
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10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Safari iOS 6
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Samsung Internet Android 2.0
createDelay Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
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createDynamicsCompressor Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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Samsung Internet Android 2.0
createGain Chrome 10
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10
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Prefixed Implemented with the vendor prefix: webkit
Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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15
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed
Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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6
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android 2.0
createIIRFilter Chrome 49 Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 50.
IE 不支持 No Opera Yes Safari 不支持 No WebView Android 49 Chrome Android 49 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 50.
Opera Android Yes Safari iOS 不支持 No Samsung Internet Android 5.0
createOscillator Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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createPanner Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
Prefixed
6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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6
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Samsung Internet Android 2.0
createPeriodicWave Chrome 59
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Default values supported
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10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Default values supported
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createScriptProcessor Chrome 10
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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6
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android 2.0
createStereoPanner Chrome 42 Edge ≤18 Firefox 53
注意事项
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Originally implemented on AudioContext in Firefox 37.
IE 不支持 No Opera 不支持 No Safari 不支持 No WebView Android Yes Chrome Android Yes Firefox Android 53
注意事项
53
注意事项
Originally implemented on AudioContext in Firefox Android 37.
Opera Android 不支持 No Safari iOS 不支持 No Samsung Internet Android Yes
createWaveShaper Chrome 10
Prefixed
10
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Prefixed Implemented with the vendor prefix: webkit
Edge ≤18 Firefox 53
注意事项
53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
22
15
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Safari iOS 6
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Samsung Internet Android 2.0
currentTime Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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6
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Samsung Internet Android 2.0
decodeAudioData Chrome 10
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Prefixed Implemented with the vendor prefix: webkit
Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
22
15
Prefixed
Prefixed Implemented with the vendor prefix: webkit
Safari 6
Prefixed
6
Prefixed
Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
注意事项
53
注意事项
Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
22
14
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
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6
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android 2.0
destination Chrome 10
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10
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Prefixed Implemented with the vendor prefix: webkit
Edge ≤18 Firefox 53
注意事项
53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
22
15
Prefixed
Prefixed Implemented with the vendor prefix: webkit
Safari 6
Prefixed
6
Prefixed
Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
注意事项
53
注意事项
Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
22
14
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
Prefixed
6
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android 2.0
listener Chrome 10
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10
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Edge ≤18 Firefox 53 IE 不支持 No Opera 22
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Safari 6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53 Opera Android 22
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onstatechange Chrome 43 Edge ≤79 Firefox 53
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53
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Originally implemented on AudioContext in Firefox 40.
IE 不支持 No Opera Yes Safari 9
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android Yes Firefox Android 53
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53
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Originally implemented on AudioContext in Firefox Android 40.
Opera Android Yes Safari iOS 9
Prefixed
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android Yes
sampleRate Chrome 10
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Edge ≤18 Firefox 53
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Originally implemented on AudioContext in Firefox 25.
IE 不支持 No Opera 22
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Prefixed Implemented with the vendor prefix: webkit
Safari 6
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6
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Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android 33 Firefox Android 53
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Originally implemented on AudioContext in Firefox Android 26.
Opera Android 22
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Prefixed Implemented with the vendor prefix: webkit
Safari iOS 6
Prefixed
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android 2.0
state Chrome 43 Edge ≤79 Firefox 53
注意事项
53
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Originally implemented on AudioContext in Firefox 40.
IE 不支持 No Opera Yes Safari 9
Prefixed
9
Prefixed
Prefixed Implemented with the vendor prefix: webkit
WebView Android Yes Chrome Android Yes Firefox Android 53
注意事项
53
注意事项
Originally implemented on AudioContext in Firefox Android 40.
Opera Android Yes Safari iOS 9
Prefixed
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Prefixed Implemented with the vendor prefix: webkit
Samsung Internet Android Yes

图例

完整支持
完整支持
不支持
不支持
兼容性未知
兼容性未知
实验。期望将来行为有所改变。
实验。期望将来行为有所改变。
见实现注意事项。
要求使用供应商前缀或不同名称。
要求使用供应商前缀或不同名称。

另请参阅