Each area has its own musical theme. This can be used to determine which zone Alucard is in, and in some cases can be used to infer other things, such as whether or not the Clock Room Statue is open (detailed in the Clock Rush [[SOTN/Alucard_Any%25_NSC_Blindfolded#Save_before_Doppelganger|Save before Doppelganger]] section below)