Diatonic key signatures Each of the twelve pitches can serve as the tonic of a major or minor key, and each of these keys will have a diatonic scale associated with it The circle diagram shows the number of sharps or flats in each key signature, with the major key indicated by a capital letter and the minor key indicated by a lowercase letterNotes on the Bass Clef;A D transposition on a piece in, say, Eflat Major results in a key signature of F Major (move from Eflat two notches to the right on the cycle of fifths) ¥ Transposing down a minor third going from C Major, this would mean that weÕre moving to A Major A Major lies three ÔnotchesÕ to the right on the cycle of fifths from A Major From here E Flat Major Scale All About Music Theory E flat major scale bass clef key signature