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12 bar blues is made up of the one chord, four chord, and five chord of any given key. For example, in the key of E it would be the chords E, A, and B. In G the chords would be G, C, and D.
The progression is...
Key of E
E - 4 measures
A - 2 meas.
E - 2 meas.
B - 1 meas.
A - 2 meas.
E - 1 meas. (sometimes the last two beats go back to the five chord B)
Key of G
G - 4 measures
C - 2 meas.
G - 2 meas.
D - 1 meas.
C - 2 meas.
G - 1 meas. (sometimes the last two beats go back to the five chord D)
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What scale degrees do you have to alter to change a major scale to a blues scale?
Major scale: 1 2 3 4 5 6 7 8 Blues scale: 1 b3 4 #4 5 b7 8 The "b" means lowered by a half-step, and the "#" means raised by a half-step.
How do you alter a major scale to create the blues scale?
Blues attempts to present some of the non-12-tone music systems from Africa, so it's not a simple major-minor transposition.One distinction is the harmonic 7th - it has a ratio of 7:4, which does not fit into any interval in the standard "Western" scale (and therefore cannot be played on fixed-pitch instrument such as a piano), and musicians often fake the interval by playing the minor seventh or a major seventh chord.{apex}bending (lowering) the 3rd, 5th, and 7th scale degree.
