ConvolverNode
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.
Number of inputs | 1 |
---|---|
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.
Instance properties
Inherits properties from its parent, AudioNode
.
ConvolverNode.buffer
-
A mono, stereo, or 4-channel
AudioBuffer
containing the (possibly multichannel) impulse response used by theConvolverNode
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.
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.
js
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
someOtherAudioNode.connect(reverb);
reverb.connect(audioCtx.destination);
Specifications
Specification |
---|
Web Audio API # ConvolverNode |
Browser compatibility
BCD tables only load in the browser