Sound-Manager class:

private:
	irrklang::ISoundEngine* soundEngine;
	std::vector<irrklang::ISoundSource*> sounds;
	
	irrklang::ISound* music;
	
	bool musicIsOn;
	
	void loadSounds (void)
	{	
		The function loads all filenames including the paths and puts the Sound sources into a vector.
		sounds.push_back( soundEngine->addSoundSourceFromFile(file.c_str()) );
	}
	
	
public:
	void start (void)
	{
		soundEngine = createIrrKlangDevice();
		loadSounds();
	}
	
	void playMusic (int ID)
	{
		stopCurrentMusic();
		if (musicIsOn)
		{
			music = soundEngine->play2D(sounds.at(ID), true, false, true);
		}
	}

	void stopCurrentMusic (void)
	{
		if (music)
		{
			music->setIsPaused(true);
			music->stop();
		}
	}