web-audio-coverage.md

Web Audio API coverage

List below shows which interfaces has been completed, are in progress or not yet started. Status of each interface is based on availability of each method and property that should be available to the API user. Progress on internal features and implementation that are not part of user-facing apis, are not yet covered here.

Some of the noticeable implementation details that are still in progress or not yet started are:

• Support of different number of channels (current approach in most of the audio-graph nodes assumes working with two channel audio)
• Multi-input for each node and input mixing (Although specification suggests that most of the nodes can cave only one input or output, common use-cases proves otherwise). Only node that mixes multiple inputs is DestinationNode.

✅ Completed (10 out of 32)

AudioBuffer

AudioDestinationNode

AudioNode

AudioScheduledSourceNode

BiquadFilterNode

GainNode

OscillatorNode

PeriodicWave

StereoPannerNode

AudioParam

🚧 In Progress (3 out of 32)

AudioContext

Property 🔹/ Method 🔘	state
🔹 baseLatency	❌
🔹 outputLatency	❌
🔹 sinkId	❌
🔘 close	✅
🔘 createMediaElementSource	❌
🔘 createMediaStreamSource	❌
🔘 createMediaStreamTrackSource	❌
🔘 resume	❌
🔘 setSinkId	❌
🔘 suspend	❌

AudioBufferSourceNode

Property 🔹/ Method 🔘	state
🔹 buffer	✅
🔹 detune	✅
🔹 loop	✅
🔹 loopStart	✅
🔹 loopEnd	✅
🔹 playBackRate	✅
🔘 start(overridden)	❌

BaseAudioContext

Property 🔹/ Method 🔘	state
🔹 audioWorklet	❌
🔹 currentTime	✅
🔹 destination	✅
🔹 listener	❌
🔹 sampleRate	✅
🔹 state	✅
🔘 createAnalyser	❌
🔘 createBiquadFilter	✅
🔘 createBuffer	✅
🔘 createBufferSource	✅
🔘 createConstantSource	❌
🔘 createChannelMerger	❌
🔘 createChannelSplitter	❌
🔘 createConvolver	❌
🔘 createDelay	❌
🔘 createDynamicsCompressor	❌
🔘 createGain	✅
🔘 createIIRFilter	❌
🔘 createOscillator	✅
🔘 createPanner	❌
🔘 createPeriodicWave	✅
🔘 createStereoPanner	✅
🔘 createWaveShaper	❌
🔘 decodeAudioData	❌

❌ Not yet available (19 out of 32)

AudioParamMap

MediaElementAudioSourceNode

MediaStreamAudioSourceNode

MediaStreamTrackAudioSourceNode

ConvolverNode

DelayNode

DynamicsCompressorNode

WaveShaperNode

IIRFilterNode

MediaStreamAudioDestinationNode

AnalyserNode

ChannelSplitterNode

MergerNode

AudioListener

PannerNode

AudioWorkletNode

AudioWorkletProcessor

AudioWorkletGlobalScope

OfflineAudioContext