if (!audio_is_playing(oMusicV2.bossbgm))
    audio_play_sound(oMusicV2.bossbgm, 1, true)
audio_sound_gain(oMusicV2.bossbgm, 0, 0)
audio_sound_gain(oMusicV2.bossbgm, (global.opmusicvolume / 100), 3000)