Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The bufferSize property of the ScriptProcessorNode interface returns an integer representing both the input and output buffer size, in sample-frames. Its value can be a power of 2 value in the range 25616384.

Note: This feature was replaced by AudioWorklets and the AudioWorkletNode interface.


var audioCtx = new AudioContext();
var scriptNode = audioCtx.createScriptProcessor(4096, 1, 1);


An integer.


See BaseAudioContext.createScriptProcessor() for example code.


Since the August 29 2014 Web Audio API specification publication, this feature has been deprecated. It is no longer on track to become a standard.

It was replaced by AudioWorklets and the AudioWorkletNode interface.

Browser compatibility

BCD tables only load in the browser

See also