/Web APIs


The ConvolverNode interface is an AudioNode that performs a Linear Convolution on a given AudioBuffer, often used to achieve a reverb effect. A ConvolverNode always has exactly one input and one output.

Note: For more information on the theory behind Linear Convolution, see the Convolution article on Wikipedia.

EventTarget AudioNode ConvolverNode
Number of inputs 1
Number of outputs 1
Channel count mode "clamped-max"
Channel count 1, 2, or 4
Channel interpretation "speakers"



Creates a new ConvolverNode object instance.

Instance properties

Inherits properties from its parent, AudioNode.


A mono, stereo, or 4-channel AudioBuffer containing the (possibly multichannel) impulse response used by the ConvolverNode to create the reverb effect.


A boolean that controls whether the impulse response from the buffer will be scaled by an equal-power normalization when the buffer attribute is set, or not.

Instance methods

No specific method; inherits methods from its parent, AudioNode.

ConvolverNode Example

The following example shows basic usage of an AudioContext to create a convolver node.

Note: You will need to find an impulse response to complete the example below. See this Codepen for an applied example.

let audioCtx = new window.AudioContext();

async function createReverb() {
  let convolver = audioCtx.createConvolver();

  // load impulse response from file
  let response = await fetch("path/to/impulse-response.wav");
  let arraybuffer = await response.arrayBuffer();
  convolver.buffer = await audioCtx.decodeAudioData(arraybuffer);

  return convolver;

// …

let reverb = await createReverb();

// someOtherAudioNode -> reverb -> destination


Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
ConvolverNode 55 79 53 No 42 14.1 55 55 53 42 14.5 6.0
ConvolverNode 14 12 25 No 15 6 4.4.3 18 25 14 6 1.0
buffer 14 12 25 No 15 6 4.4.3 18 25 14 6 1.0
normalize 18 12 25 No 15 6 4.4.3 18 25 14 6 1.0

See also

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