ConvolverNode: normalize property

The normalize property of the ConvolverNode interface is 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.

Its default value is true in order to achieve a more uniform output level from the convolver, when loaded with diverse impulse responses. If normalize is set to false, then the convolution will be rendered with no pre-processing/scaling of the impulse response. Changes to this value do not take effect until the next time the buffer attribute is set.


A boolean.


Switching normalization off

The following example creates a convolver node and assigns it an AudioBuffer. Before assigning the audio buffer, it sets normalize to false.

const audioCtx = new AudioContext();
// ...

const convolver = audioCtx.createConvolver();
// ...

// Grab audio track via fetch() for convolver node
try {
  const response = await fetch(
  const arrayBuffer = await response.arrayBuffer();
  const decodedAudio = await audioCtx.decodeAudioData(arrayBuffer);
  convolver.normalize = false; // must be set before the buffer, to take effect
  convolver.buffer = decodedAudio;
} catch (error) {
    `Unable to fetch the audio file: ${name} Error: ${err.message}`,


Web Audio API
# dom-convolvernode-normalize

Browser compatibility

BCD tables only load in the browser

See also