Introduction music won't stop

[Cruzore]

void musicstart(float afFadeTime, int alPrio)
wrong callback syntax, it's
void MyFunc(string &in asTimer)

Edit:
PlayMusic("Ambient_Ghost.ogg",true,1,0,0,false);
It has the same priority, so it will either bug out or won't play at all, since priority 0 is stopped right after. Better change it