Music fade out in one specific area

[Desdinova]

Is there any possible way to make my main music track fade out and another fade in, and vice versa when leaving said area? I'm using UDMF

[Rifleman]

In the editor under Things/Sector actions you can find Actor enters/leaves sector. Put them in a sector and make them run a script. Or use linedefs to do the same. I used a script like this:
 

int musicVolume = 1.0;

Script "Music03" (void)
{
    while(musicVolume > 0)
    {
        musicVolume -= 0.025;
        SetMusicVolume(musicVolume);
        Delay(1);
    }

    SetMusic("D_MAP03");

    while(musicVolume < 1.0)
    {
        musicVolume += 0.025;
        SetMusicVolume(musicVolume);
        Delay(1);
    }
}