Baseline Widely available
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 inputs1 Number of outputs 1 Channel count mode "clamped-max" Channel count 1, 2, or 4 Channel interpretation "speakers" Constructor
ConvolverNode()
Creates a new ConvolverNode object instance.
Inherits properties from its parent, AudioNode.
ConvolverNode.buffer
A mono, stereo, or 4-channel AudioBuffer containing the (possibly multichannel) impulse response used by the ConvolverNode to create the reverb effect.
ConvolverNode.normalize
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.
No specific method; inherits methods from its parent, AudioNode.
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;
}
// â¦
let reverb = await createReverb();
// someOtherAudioNode -> reverb -> destination
someOtherAudioNode.connect(reverb);
reverb.connect(audioCtx.destination);
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