Just enjoyed a great thread about string gauge preference and why guitarists tune downward; special thanks to Bonzo21's input. Now, a specific example here; I'm fairly new to guitar and lovin' it. I play an Epi SG w/newly installed SD Pearly Gates. There was this one hit wonder 80's band called Autograph with a hit song called "Turn Up the Radio". I like to play along w/songs and figure out their key signature; this one has me stumped because nothing seems to fit exactly. An experienced guitarist friend who plays professionally tells me this song was a bit unusual; the key signature being "somewhere in between". Why would a song be composed "somewhere in between"?