1. @DomName('AudioBufferCallback')
  2. @Experimental()
void AudioBufferCallback(audioBuffer_OR_exception)

Source 

@DomName('AudioBufferCallback')
// https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioBuffer-section
@Experimental()
typedef void AudioBufferCallback(audioBuffer_OR_exception);