public void ChangeMusicMode(int mode) {
		if (MusicMode != mode) {		
			MusicMode = mode;
			if (music != null) {
				music.Stop();
				music.Close();
				music = null;
			}
			switch (MusicMode) {
			case MusicCD:
				music = cdaudio;
				if (!music.Open(this)) {
					MusicMode = MusicOff;
					music = null;
				}
				break;
			}
			if (music != null && MusicNo > 0) {
				music.Play(MusicNo);
			}
		}
	}