ScriptProcessorNode createScriptProcessor(
    [int bufferSize,
    int numberOfInputChannels,
    int numberOfOutputChannels]) native;
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dart.dev/stable/2.5.0/dart-web_audio/BaseAudioContext/createScriptProcessor.html