Original Post
While replaying some of my favourite games, I've noticed that in many of them (for example in many NES/SNES games), the music tracks are often variations of the another theme (such as of the game's main theme.) However, I did not notice this at all the first time I played. My question is, why do composers use variations? Does it make the soundtrack more "consistent"? I suspect that most players do not notice that variations are used, so probably the "wow, this is a nice variation of x!" -reaction is not the main reason. Maybe someone who has knowledge of music theory or composition can enlighten me?