ConvolverNode

ConvolverNode is an interface within the Web Audio API that allows for the application of a convolution effect to an audio signal. It takes an input audio buffer and a kernel audio buffer and processes the input using the kernel. The kernel, often referred to as an impulse response, defines the characteristics of the reverberation or other effects that will be applied.

The ConvolverNode interface provides several properties to control the convolution process. The buffer property allows setting the impulse response audio buffer. A boolean property, normalize, determines whether the impulse response is normalized before processing. Setting normalize to true can help prevent clipping and maintain a consistent output level, especially when using different impulse responses.

The ConvolverNode is typically used to create realistic reverberation effects by convolving an audio source with the impulse response of a real or simulated space. By loading different impulse response files, a wide variety of acoustic environments can be emulated, from small rooms to large cathedrals. It can also be used for other effects like flanging or phasing by using specific types of impulse responses. The output of a ConvolverNode is another audio buffer, which can then be routed to other nodes in the Web Audio API graph, such as a GainNode or a destination node for playback.