Circle of fifths on guitar

Circle of Fifths

The circle of fifths is an invaluable tool that reveals important relationships between pitches and organizes them in a way that’s very useful to understanding diatonic harmony.

Guitar laying with guitar chord key chart in messenger bag

Guitar Chord Key Chart

Below is a guitar chord key chart the major and minor keys. A chord key chart outlines the diatonic chords, or the chords that naturally occur in a given key. Chord charts are useful when trying to figure out the key of a song.