"Pitch Axis" Theory by Joe Satriani
The principle is that any number of harmonic settings can be linked by the same tonal center. If you're in C major (C D E F G A B C ) for, say, four bars and in C minor (C, D, E flat, F, G, A flat, B flat) for the next four: the major and minor keys share the same tonic, C and this note is a center. It's a pivot on which you shift harmonies. You could then take four bars in C Phrygian (C, D flat, E flat, F, G, A flat, B flat), and then four in C Mixolydian (C D E F G A B flat).
Thus, one pitch provides an axis point for the scales and chords of variety of harmonic situations.
Let's look at Pich Axis in action.
Ex.1 "Satch Boogie" (Bridge) - "Surfing With The Alien".
Chords in order of appearance
5. __Open A in every chord_______________________
progression is: A5(sharp 11) => A(dim) => Dm add4/A => Asus4 =>
B(flat)sus4/A => Bsus4/A => Csus4/A => Amaj7(add6) => Dm6/A => E(flat9)/A
=> A7sus4 => Amaj7 => A7
T - Tap; P - Pull; H - Hammer
See the whole thing in Boogie section below
Joe Satriani: Guitar Secrets
Performed by Joe Satriani.
Learn guitar tips, tricks and secrets with this collection of articles and tips from Satriani's famous columns that have appeared in Guitar For The Practicing Musician magazine. Who better to learn guitar from than the master himself?
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