The Minor Pentatonic Scale:
The minor pentatonic scale consist of five notes The pattern for these notes is: 1 b3 4 5 b7
The following 5 numbers unleashes lock on your guitar. Kidding aside,, these numbers are actually a formula that tells us what we need to change in the major scale in order to create the pentatonic scale. Let’s use A Minor Pentatonic Scale as a basis for you to fully understand the formula behind the World of Pentatonic.
Step 1: A B C# D E F# G#----These seven notes make up the A Major Scale
Step 2: Get rid of the 2nd and 6th note on the major scale above. A C# D E G# ----These five notes is what we call A Minor Pentatonic Scale. You end up having 1, 3, 4, 5, and the 7 notes of the scales, you remove the 2nd and 6th notes because they are not included in the pentatonic scale.
Step 3: Create a semitone by lowering the original notes. A semitone is basically one fret or one half-step down from the original note. A C D E G---These is the notes that you would end up with if you’re going to use the formula b3 and b7(flat third and flat seventh)by lowering the third and seventh notes.
The Blues Scale:
The blues scale is closely related to the pentatonic scale; all you have to do is add 2 notes on the 5th string, 2nd fret, and the 3rd string, 4th fret. The new formula for a blues scale is as follows:1 b3 4 b5 5 b7 1 or A C D D# E G# A
Below is an example of of translating the blues scale formula into an A blues scale. Plug in your guitar and start wailing like blues god Jimi Hendrix.