Posted Oct 25, 2012 03:07 PM
The 5 note Minor Pentatonic scale is the 5th mode of the 5 note Major Pentatonic scale. To produce each mode of the Pentatonic scale:
Play 1st, 2nd, 3rd, 5th and 6th notes of the Major scale.
1st degree of the Major Pentatonic scale=1, 2nd=2, 3rd=3, 5th=4, 6th=5th note of the pentatonic scale.
Play 5 notes starting from the 1st, play 5 notes starting from 2nd, play 5 notes starting from the 3rd, play 5 notes starting from the 4th, play 5 notes starting from 5th.
If the Major Pentatonic scale is in C, the first note of the Minor Pentatonic scale will be A. This is the 5th mode (note) of the C Major Pentatonic scale.
It is generally accepted that in Blues, the location of the 1st chord of 12 bar blues indicates the 1st mode of the Minor Pentatonic scale.
1. When you play the first chord of 12 bar blues, start with the 1st mode (note) of the pentatonic scale. (This was the 5th mode of the Major Pentatonic scale).
2. When you change to the second chord of 12 bar blues, start on the 3rd mode (note) of the pentatonic scale.
3. When you change to the 3rd chord of 12 bar blues, start on the 4th mode (note) of the pentatonic scale.
Question: "When I play the notes of the Minor Pentatonic scale, they do not all match up with the notes in the 12 bar blues chords"... Diatonic Modal theory can explain this.
If this article has general acceptance, I will explain the reason why some notes are in the chord but not in the 5 note scale.