There are three forms of minor scales: natural minor, melodic minor and harmonic minor.
Formula for a natural minor scale is: 1 ~ 2 ^ -3 ~ 4 ~ 5 ^ -6 ~ -7 ~ 8
This scale is also known as an Aeolian mode or relative minor of major scale with the same
key signature, created from the 6th degree of the major scale:
There are 15 relative minor scales (in general 12). See major scales in
Now to form a melodic or tonic or parallel minor scale from a major scale - lower the 3rd
degree of the major scale half step. The scale formula is: 1 ~ 2 ^ -3 ~ 4 ~ 5 ~ 6 ~ 7 ^ 8
To form a harmonic minor scale from a major scale - lower the 3rd and 6th degrees of the
major scale half step. Scale formula is: 1 ~ 2 ^ -3 ~ 4 ~ 5 ^ -6 ~ ^ 7 ^ 8
Let's analyse the interval relationship of each tone of the C major scale to the
Notice that, the augmented 4th and the diminished 5th are enharmonic as well as the
augmented 5th and the minor 6th. The interval of the augmented 4th or diminished 5th
(one-half of the octave) is also none as tritone because it's range is that of three whole tones
to lesson 2.