@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ ((gainAlbum_dB == null) ? 0 : gainAlbum_dB.hashCode());
		result = prime
				* result
				+ ((gainReference_dB == null) ? 0 : gainReference_dB.hashCode());
		result = prime * result
				+ ((gainTrack_dB == null) ? 0 : gainTrack_dB.hashCode());
		result = prime * result
				+ ((peakAlbum == null) ? 0 : peakAlbum.hashCode());
		result = prime * result
				+ ((peakTrack == null) ? 0 : peakTrack.hashCode());
		return result;
	}