Pitch axis theory refers to a way of thinking about chord progressions and modes, that was heavily used and popularized (though not invented) by the guitarist Joe Satriani. When composing using this concept, the pitch axis is simply a chosen note (a specific pitch), which is thought of as the tonic for a sequence of chords, which must all have this pitch as their root note.
Pitch axis theory refers to a way of thinking about chord progressions and modes, that was heavily used and popularized (though not invented) by the guitarist Joe Satriani. When composing using this concept, the pitch axis is simply a chosen note (a specific pitch), which is thought of as the tonic for a sequence of chords, which must all have this pitch as their root note.
Source: Wikipedia "Pitch axis theory" · CC BY-SA 4.0
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