/// @description Up

switch(slider_id) {
case SLIDER.SOUND:
	gpsound_volume = min(gpsound_volume + 0.1, 1);
	audio_emitter_gain(gpsound_emitter, gpsound_volume);
	val = gpsound_volume;
	break;
case SLIDER.MUSIC:
	var _was = gpmusic_volume;
	gpmusic_volume = min(gpmusic_volume + 0.1, 1);
	audio_emitter_gain(gpmusic_emitter, gpmusic_volume);
	if (_was == 0)
		sc_music_change(global.music_current);
	val = gpmusic_volume;
	break;
}