piano scale
G♭ Lydian dominant
G♭1A♭2B♭3C♯4D♭5E♭6F♭♭7
Raised fourth and flattened seventh at once — the fourth mode of melodic minor.
The same sounds spelled from the other side are F♯ Lydian dominant.
Written out
Every accidental is written in, rather than left to a key signature, so the letters can be read one at a time.
The step pattern
G♭WA♭WB♭WCHD♭WE♭HF♭WG♭
What is true of it
G♭ Lydian dominant is G♭, A♭, B♭, C, D♭, E♭ and F♭, and back to G♭.
Its steps are W – W – W – H – W – H – W, where W is a whole step and H a half.
It costs 6 alterations to write — near the limit of what a key signature can carry.
On the same tonic, G♭ Lydian differs from it by exactly one note.
Chords made only of these notes
CdimdiminishedCaugaugmentedCm7♭5half-diminished seventhD♭mminorE♭mminorE♭m7minor seventhG♭majorG♭7dominant seventh
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on G♭
G♭ Phrygian dominantexoticG♭ alteredexoticG♭ double harmonicexoticG♭ majormajorG♭ natural minorminorG♭ harmonic minorminor
C lyd domC♯ lyd domD♭ lyd domD lyd domD♯ lyd domE♭ lyd domE lyd domF lyd domall 374