fPeakListener
fPeakListener = handler;
fAudioProducer->SetPeakListener(fPeakListener);
fAudioProducer->SetPeakListener(fPeakListener);
BHandler* fPeakListener;
fPeakListener = handler;
if (fPeakListener
fPeakListener, message);
BHandler* fPeakListener;