I havent got that far but i assume it means
1.When you exit out of it you hear it as you walk
2.You can hear it wihtout exiting but exiting reverts back to the normal music for that route.
3.That it was never meant to be..but they put it there anyway
-Less Cringey Stuff here -
Avy+Sig done by Cyn check out his Shop in the Graphic-Requests Forum if it still exists.