static int AudioEngine_PortAudioCallback(
		const void *inputBuffer
		,void *outputBuffer
		,unsigned long framesPerBuffer
		,const PaStreamCallbackTimeInfo* timeInfo
		,PaStreamCallbackFlags statusFlags
		,void *userData
	){
		AudioEngine* engine = (AudioEngine*) userData;
		return engine->fetchSoundData( outputBuffer, framesPerBuffer );
	}