see this is the problem
a jrpg will play you the same piece of battle music for ten hours but randomly an enemy you’ve never seen before will pop in and unbeknownst to you this will have a unique piece of music
spelunky hd actually has something like this - there are “rare drops” for music. some tunes only play at pretty low odds so you’ll have heard the main tune dozens of times before randomly encountering one of the alternates.
aaaaaaaaaaaaaaaaaaaaaaa