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    Interface AnalyserNode

    The AnalyserNode interface represents a node able to provide real-time frequency and time-domain analysis information.

    MDN Reference

    interface AnalyserNode {
        channelCount: number;
        channelCountMode: ChannelCountMode;
        channelInterpretation: ChannelInterpretation;
        context: BaseAudioContext;
        fftSize: number;
        frequencyBinCount: number;
        maxDecibels: number;
        minDecibels: number;
        numberOfInputs: number;
        numberOfOutputs: number;
        smoothingTimeConstant: number;
        addEventListener(
            type: string,
            callback: EventListenerOrEventListenerObject | null,
            options?: boolean | AddEventListenerOptions,
        ): void;
        connect(
            destinationNode: AudioNode,
            output?: number,
            input?: number,
        ): AudioNode;
        connect(destinationParam: AudioParam, output?: number): void;
        disconnect(): void;
        disconnect(output: number): void;
        disconnect(destinationNode: AudioNode): void;
        disconnect(destinationNode: AudioNode, output: number): void;
        disconnect(destinationNode: AudioNode, output: number, input: number): void;
        disconnect(destinationParam: AudioParam): void;
        disconnect(destinationParam: AudioParam, output: number): void;
        dispatchEvent(event: Event): boolean;
        getByteFrequencyData(array: Uint8Array<ArrayBuffer>): void;
        getByteTimeDomainData(array: Uint8Array<ArrayBuffer>): void;
        getFloatFrequencyData(array: Float32Array<ArrayBuffer>): void;
        getFloatTimeDomainData(array: Float32Array<ArrayBuffer>): void;
        removeEventListener(
            type: string,
            callback: EventListenerOrEventListenerObject | null,
            options?: boolean | EventListenerOptions,
        ): void;
    }

    Hierarchy (View Summary)

    Index

    Properties

    channelCount channelCountMode channelInterpretation context fftSize frequencyBinCount maxDecibels minDecibels numberOfInputs numberOfOutputs smoothingTimeConstant

    Methods

    addEventListener connect disconnect dispatchEvent getByteFrequencyData getByteTimeDomainData getFloatFrequencyData getFloatTimeDomainData removeEventListener

    Properties

    channelCount: number

    The channelCount property of the AudioNode interface represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node.

    MDN Reference

    channelCountMode: ChannelCountMode

    The channelCountMode property of the AudioNode interface represents an enumerated value describing the way channels must be matched between the node's inputs and outputs.

    MDN Reference

    channelInterpretation: ChannelInterpretation

    The channelInterpretation property of the AudioNode interface represents an enumerated value describing how input channels are mapped to output channels when the number of inputs/outputs is different.

    MDN Reference

    context: BaseAudioContext

    The read-only context property of the the node is participating in.

    MDN Reference

    fftSize: number

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

    MDN Reference

    frequencyBinCount: number

    The frequencyBinCount read-only property of the AnalyserNode interface contains the total number of data points available to AudioContext BaseAudioContext.sampleRate.

    MDN Reference

    maxDecibels: number

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

    MDN Reference

    minDecibels: number

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

    MDN Reference

    numberOfInputs: number

    The numberOfInputs property of the AudioNode interface returns the number of inputs feeding the node.

    MDN Reference

    numberOfOutputs: number

    The numberOfOutputs property of the AudioNode interface returns the number of outputs coming out of the node.

    MDN Reference

    smoothingTimeConstant: number

    The smoothingTimeConstant property of the AnalyserNode interface is a double value representing the averaging constant with the last analysis frame.

    MDN Reference

    Methods

    • The connect() method of the AudioNode interface lets you connect one of the node's outputs to a target, which may be either another AudioNode (thereby directing the sound data to the specified node) or an change the value of that parameter over time.

      MDN Reference

      Parameters

      • destinationNode: AudioNode
      • Optionaloutput: number
      • Optionalinput: number

      Returns AudioNode

    • Parameters

      • destinationParam: AudioParam
      • Optionaloutput: number

      Returns void

    • The disconnect() method of the AudioNode interface lets you disconnect one or more nodes from the node on which the method is called.

      MDN Reference

      Returns void

    • Parameters

      • output: number

      Returns void

    • Parameters

      Returns void

    • Parameters

      Returns void

    • Parameters

      • destinationNode: AudioNode
      • output: number
      • input: number

      Returns void

    • Parameters

      Returns void

    • Parameters

      Returns void

    • The dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order.

      MDN Reference

      Parameters

      Returns boolean

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

      MDN Reference

      Parameters

      Returns void

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

      MDN Reference

      Parameters

      Returns void

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

      MDN Reference

      Parameters

      Returns void

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

      MDN Reference

      Parameters

      Returns void

    • The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target.

      MDN Reference

      Parameters

      Returns void

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