An Overview of Basic Music Theory
All songs are played in a key. Most songs for most styles can be played using only 8 chords for accompaniment and 6 scales for melodies or solos in each key. Ron Greene’s’ Music Dials instantly show you the chords & scales you need in each key.
The 8 chords in each key you should know:
The 6 common chords come from the major scale notes in each key and are called scale tone chords (I = do, IIm = re, IIIm = mi, IV = fa, V = so, VIm = la).
The 2 optional chords (bIII, bVII), commonly used for rock & blues, come from the flatted third and flatted seventh (notes of the major scale and can also be used to play songs in each key.)
Except for jazz, most songs use only major, minor and seventh chords and these are the basic chords you should learn in each key. Experiment with and have fun playing, creating or improvising great sounding chord progressions in each key.
There are four chord types: major, minor, augmented, diminished. There are many extensions of these chord types including: suspended, fifth, sixth, seventh, ninth, eleventh and thirteenth chords. Chord formulas define which major scale notes are contained in the chord (1 = do, 2 = re,3 = mi, 4 = fa, 5 = so, 6 = la, 7 = ti). Below are the formulas for the 4 chord types and their extensions:
The 6 scales in each key you should know:
The specific scale you use to play solo in each key depends on the type of sound you want to create. The 6 most commonly used scales include 2 for “melodic” sounding solos in major keys, 2 for “blues” sounding solos in major keys and 2 for “minor” sounding solos in minor keys.
Scale formulas define which major scale notes are contained in the scale (1 = do, 2 = re, 3 = mi, 4 = fa, 5 = so, 6 = la, 7 = ti).
The chart on the right shows the formulas for the 6 scales.