I was working with a student recently and got into the discussion of key signatures. The student was a beginner and had heard of key signature but didn’t really understand anything about them. So to help them out I told them this: You can think of key signatures as scales. In a way they are the same thing.  By this I mean when we say that a song is in the key of “C Major” then the song is based on the C Major scale. If you have heard or seen my lesson on Harmonic Structure (it’s in the paid…