current music pointers

No, what I mean is that during a non event, how do i change the default current music? for example, if the current music is naturally the town theme, how do i change it where it becomes the under martial law theme without the music resetting when entering the next room?

As I already said, this needs to be done in the entrance event of the map. You need to set the song there based on some event bit condition (otherwise if you just set the song it will always play and you're better using the map property song ID). If the next room is on the same map the song will continue to play. I'm not 100% sure but I think if you set a song to play that is already playing it will not reset. Sadly there is no event command where you can make a check like "if song X is not playing do Y".