STRINGSCALES

G♭ messiaen's mode #7 Scale — Guitar Fretboard Visualization

Low E string: F, Gb, Abb, Ab, Bbb, Cb, C, Db, Ebb, Eb at frets 1, 2, 3, 4, 5, 7, 8, 9, 10, 11

A string: Bbb, Cb, C, Db, Ebb, Eb, F, Gb, Abb, Ab, Bbb at frets 0, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12

D string: Ebb, Eb, F, Gb, Abb, Ab, Bbb, Cb, C, Db, Ebb at frets 0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 12

G string: Abb, Ab, Bbb, Cb, C, Db, Ebb, Eb, F, Gb, Abb at frets 0, 1, 2, 4, 5, 6, 7, 8, 10, 11, 12

B string: Cb, C, Db, Ebb, Eb, F, Gb, Abb, Ab, Bbb, Cb at frets 0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 12

High E string: F, Gb, Abb, Ab, Bbb, Cb, C, Db, Ebb, Eb at frets 1, 2, 3, 4, 5, 7, 8, 9, 10, 11

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Gb messiaen's mode #7

Messiaen's mode 7 is the largest mode of limited transposition: ten notes, leaving out just one whole-step pair per tritone half. It is nearly chromatic, with symmetry at the tritone and only six distinct transpositions. In practice it works as organized chromaticism: dense clusters and runs that still obey an internal pattern rather than free atonality.

it consists of these notes and degrees:

G♭

I

A𝄫

bII

A♭

II

B𝄫

bIII

C♭

IV

C

#IV

D♭

V

E𝄫

bVI

E♭

VI

F

VII

messiaen's mode #7 in all 12 keys, with chords and related scales

tip
  • Ten notes from Gb: think of it as the chromatic scale with one whole-step gap per tritone half; the gaps define it, so phrase around them.
  • Its symmetry at the tritone (C) gives structure to near-chromatic runs: mirror each gesture six frets away.
  • Use it as organized chromaticism for climaxes: scale-wise motion reads as intent where free chromatics read as noise.
  • Extract subsets: any five adjacent tones give a dense cluster scale; contrast two subsets from opposite tritone halves.

How to play G♭ messiaen's mode #7 on guitar

Two frets of capo turn 8 flats into plain E fingering, which means the spelling stops mattering once the clamp goes on. Without it, roots sit at fret 2 on both E strings and fret 4 on the D string. Identical fingering also answers for C, six semitones up, so drilling either key trains both. Open B, G, D, and A sit in the key as Cb, Abb, Ebb, and Bbb. Position one ends at fret 6, so shift early.

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