if (oMusicV2.currentbgm != argument0)
{
    oMusicV2.previousbgm = oMusicV2.currentbgm
    oMusicV2.currentbgm = argument0
    if audio_is_playing(oMusicV2.previousbgm)
        audio_sound_gain(oMusicV2.previousbgm, 0, 3000)
    if (!audio_is_playing(oMusicV2.currentbgm))
        audio_play_sound(oMusicV2.currentbgm, 1, true)
    audio_sound_gain(oMusicV2.currentbgm, 0, 0)
    audio_sound_gain(oMusicV2.currentbgm, (global.opmusicvolume / 100), 3000)
    if file_exists("musItemAmb2.ogg")
    {
        if (oMusicV2.previousbgm == 348)
            mus_resume(oMusicV2.currentbgm)
    }
}