Variation on "epiphany." A sudden manifestation of the essence or meaning of something as a result of listening to a particular song. Often, the more obsure the lyrics or music is, the deeper the resulting epiphonistic experience.
"Dude, I had a total epiphony about my relationship with Riama after listening to that Radiohead song."
"The Broun Fellini's show was a really amazing epiphonistic experience. I'm a changed person after hearing Black Edgar on the saxophone."