Interface: Analyzer

Hierarchy

• BaseAudioNode

  ↳ Analyzer

Properties

fftSize

• fftSize: number

---

frequencyBinCount

• Readonly frequencyBinCount: number

---

maxDecibels

• maxDecibels: number

---

minDecibels

• minDecibels: number

---

node

• Readonly node: AnalyserNode

---

smoothingTimeConstant

• smoothingTimeConstant: number

Methods

connect

▸ connect(destinationNode, output?, input?): AudioNode

Parameters

Name	Type
destinationNode	AudioNode
output?	number
input?	number

Returns

AudioNode

Inherited from

BaseAudioNode.connect

▸ connect(destinationParam, output?): void

Parameters

Name	Type
destinationParam	AudioParam
output?	number

Returns

void

Inherited from

BaseAudioNode.connect

---

disconnect

▸ disconnect(): void

Returns

void

Inherited from

BaseAudioNode.disconnect

▸ disconnect(output): void

Parameters

Name	Type
output	number

Returns

void

Inherited from

BaseAudioNode.disconnect

▸ disconnect(destinationNode): void

Parameters

Name	Type
destinationNode	AudioNode

Returns

void

Inherited from

BaseAudioNode.disconnect

▸ disconnect(destinationNode, output): void

Parameters

Name	Type
destinationNode	AudioNode
output	number

Returns

void

Inherited from

BaseAudioNode.disconnect

▸ disconnect(destinationNode, output, input): void

Parameters

Name	Type
destinationNode	AudioNode
output	number
input	number

Returns

void

Inherited from

BaseAudioNode.disconnect

▸ disconnect(destinationParam): void

Parameters

Name	Type
destinationParam	AudioParam

Returns

void

Inherited from

BaseAudioNode.disconnect

▸ disconnect(destinationParam, output): void

Parameters

Name	Type
destinationParam	AudioParam
output	number

Returns

void

Inherited from

BaseAudioNode.disconnect

---

getAverageVolume

▸ getAverageVolume(buffer): number

Utility function to get the average volume from getByteFrequencyData

Remarks

This is a better option when you only need to get the volume in terms of performance and complexity.

Parameters

Name	Type
buffer	Float32Array

Returns

number

---

getByteFrequencyData

▸ getByteFrequencyData(buffer): void

Copies the current frequency data into a Uint8Array (unsigned byte array) passed into it.

The frequency data is composed of integers on a scale from 0 to 255.

Remarks

The bytes versions are not cheaper than the float version but provided for convenient: the byte version are computed from the float version, using simple quantization to 2^8 values ref. https://padenot.github.io/web-audio-perf/#analysernode

Parameters

Name	Type	Description
buffer	Uint8Array	Use provided buffer instead of creating a new one

Returns

void

---

getByteTimeDomainData

▸ getByteTimeDomainData(buffer): void

Copies the current waveform, or time-domain, data into a Uint8Array (unsigned byte array) passed into it.

If the array has fewer elements than the AnalyserNode.fftSize, excess elements are dropped. If it has more elements than needed, excess elements are ignored.

Remarks

The bytes versions are not cheaper than the float version but provided for convenient: the byte version are computed from the float version, using simple quantization to 2^8 values ref. https://padenot.github.io/web-audio-perf/#analysernode

Parameters

Name	Type	Description
buffer	Uint8Array	Use provided buffer instead of creating a new one

Returns

void

---

getFloatFrequencyData

▸ getFloatFrequencyData(buffer): void

Copies the current waveform, or time-domain, data into Float32Array passed into it

Remarks

The buffer size should be the same as AnalyserNode.frequencyBinCount

Parameters

Name	Type	Description
buffer	Float32Array	Use provided buffer instead of creating a new one

Returns

void

---

getFloatTimeDomainData

▸ getFloatTimeDomainData(buffer): void

Copies the current waveform, or time-domain, data into Float32Array passed into it

Remarks

The buffer size should be the same as AnalyserNode.fftSize

Parameters

Name	Type	Description
buffer	Float32Array	Use provided buffer instead of creating a new one

Returns

void