web.AnalyserNode — clojure-interop/cljs-web-api 1.0.0

The AnalyserNode interface represents a node able to provide frequency and time-domain analysis information. It is an audio.AudioNode passes the audio stream unchanged from the input to the output, allows you to take the generated data, process it, and create visualizations.

constructor cljs

Constructor.

The AnalyserNode constructor of the Web Audio API creates a new web.AnalyserNode object instance.

Inherits parameters from the audio.AudioNodeOptions dictionary.

\tcontext \tA reference to an audio.AudioContext or web.OfflineAudioContext. \toptions Optional

\t\tfftSize: The desired initial size of the FFT for frequency-domain analysis. \t\tThe default is 2048. \t\tmaxDecibels: The desired initial maximum power in dB for FFT analysis. \t\tThe default is -30. \t\tminDecibels: The desired initial minimum power in dB for FFT analysis. \t\tThe default is -100. \t\tsmoothingTimeConstant: The desired initial smoothing constant for the FFT analysis. The default is 0.8.

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/AnalyserNode

fft-size cljs

(fft-size this)

Property.

The fftSize property of the web.AnalyserNode interface is an long value and represents the window size in samples that is when performing a Fast Fourier Transform (FFT) to get frequency data.

var curValue = analyserNode.fftSize; analyserNode.fftSize = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize

frequency-bin-count cljs

(frequency-bin-count this)

Property.

The frequencyBinCount read-only property of the web.AnalyserNode is an unsigned integer half that of the web.AnalyserNode.fftSize. generally equates to the number of data values you will have play with for the visualization.

var arrayLength = analyserNode.frequencyBinCount;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/frequencyBinCount

get-byte-frequency-data cljs

(get-byte-frequency-data this & args)

Method.

The getByteFrequencyData() method of the web.AnalyserNode interface the current frequency data into a web.Uint8Array (unsigned array) passed into it.

`var audioCtx = new AudioContext(); var analyser = audioCtx.createAnalyser(); var dataArray = new Uint8Array(analyser.frequencyBinCount); // Uint8Array should be the same length as the frequencyBinCount

void analyser.getByteFrequencyData(dataArray); // fill the Uint8Array with data returned from getByteFrequencyData()`

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteFrequencyData

get-byte-time-domain-data cljs

(get-byte-time-domain-data this & args)

Method.

The getByteTimeDomainData() method of the web.AnalyserNode copies the current waveform, or time-domain, data into a web.Uint8Array byte array) passed into it.

const audioCtx = new AudioContext(); const analyser = audioCtx.createAnalyser(); const dataArray = new Uint8Array(analyser.fftSize); // Uint8Array should be the same length as the fftSize analyser.getByteTimeDomainData(dataArray); // fill the Uint8Array with data returned from getByteTimeDomainData()

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteTimeDomainData

get-float-frequency-data cljs

(get-float-frequency-data this & args)

Method.

The getFloatFrequencyData() method of the web.AnalyserNode copies the current frequency data into a web.Float32Array array into it.

`var audioCtx = new AudioContext(); var analyser = audioCtx.createAnalyser(); var dataArray = new Float32Array(analyser.frequencyBinCount); // Float32Array should be the same length as the frequencyBinCount

void analyser.getFloatFrequencyData(dataArray); // fill the Float32Array with data returned from getFloatFrequencyData()`

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getFloatFrequencyData

get-float-time-domain-data cljs

(get-float-time-domain-data this & args)

Method.

The getFloatTimeDomainData() method of the web.AnalyserNode copies the current waveform, or time-domain, data into a web.Float32Array passed into it.

var audioCtx = new AudioContext(); var analyser = audioCtx.createAnalyser(); var dataArray = new Float32Array(analyser.fftSize); // Float32Array needs to be the same length as the fftSize analyser.getFloatTimeDomainData(dataArray); // fill the Float32Array with data returned from getFloatTimeDomainData()

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getFloatTimeDomainData

max-decibels cljs

(max-decibels this)

Property.

The maxDecibels property of the web.AnalyserNode interface a double value representing the maximum power value in the scaling for the FFT analysis data, for conversion to unsigned byte/float — basically, this specifies the maximum value for the range of when using getFloatFrequencyData() or getByteFrequencyData().

var curValue = analyserNode.maxDecibels; analyserNode.maxDecibels = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/maxDecibels

min-decibels cljs

(min-decibels this)

Property.

The minDecibels property of the web.AnalyserNode interface a double value representing the minimum power value in the scaling for the FFT analysis data, for conversion to unsigned byte/float — basically, this specifies the minimum value for the range of when using getFloatFrequencyData() or getByteFrequencyData().

var curValue = analyserNode.minDecibels; analyserNode.minDecibels = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/minDecibels

set-fft-size! cljs

(set-fft-size! this val)

Property.

The fftSize property of the web.AnalyserNode interface is an long value and represents the window size in samples that is when performing a Fast Fourier Transform (FFT) to get frequency data.

var curValue = analyserNode.fftSize; analyserNode.fftSize = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize

set-frequency-bin-count! cljs

(set-frequency-bin-count! this val)

Property.

The frequencyBinCount read-only property of the web.AnalyserNode is an unsigned integer half that of the web.AnalyserNode.fftSize. generally equates to the number of data values you will have play with for the visualization.

var arrayLength = analyserNode.frequencyBinCount;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/frequencyBinCount

set-max-decibels! cljs

(set-max-decibels! this val)

Property.

The maxDecibels property of the web.AnalyserNode interface a double value representing the maximum power value in the scaling for the FFT analysis data, for conversion to unsigned byte/float — basically, this specifies the maximum value for the range of when using getFloatFrequencyData() or getByteFrequencyData().

var curValue = analyserNode.maxDecibels; analyserNode.maxDecibels = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/maxDecibels

set-min-decibels! cljs

(set-min-decibels! this val)

Property.

The minDecibels property of the web.AnalyserNode interface a double value representing the minimum power value in the scaling for the FFT analysis data, for conversion to unsigned byte/float — basically, this specifies the minimum value for the range of when using getFloatFrequencyData() or getByteFrequencyData().

var curValue = analyserNode.minDecibels; analyserNode.minDecibels = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/minDecibels

set-smoothing-time-constant! cljs

(set-smoothing-time-constant! this val)

Property.

The smoothingTimeConstant property of the web.AnalyserNode is a double value representing the averaging constant with the analysis frame. It's basically an average between the current and the last buffer the AnalyserNode processed, and results in much smoother set of value changes over time.

var smoothValue = analyserNode.smoothingTimeConstant; analyserNode.smoothingTimeConstant = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/smoothingTimeConstant

smoothing-time-constant cljs

(smoothing-time-constant this)

Property.

The smoothingTimeConstant property of the web.AnalyserNode is a double value representing the averaging constant with the analysis frame. It's basically an average between the current and the last buffer the AnalyserNode processed, and results in much smoother set of value changes over time.

var smoothValue = analyserNode.smoothingTimeConstant; analyserNode.smoothingTimeConstant = newValue;

See also: https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/smoothingTimeConstant