piano scale
G♯ Phrygian dominant
G♯1A♭2B♯3C♯4D♯5E♭6F♯♭7
The fifth mode of harmonic minor: a flat second over a major third, so the step from the second to the third is a step and a half.
The same sounds spelled from the other side are A♭ Phrygian 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♯HAW+HB♯HC♯WD♯HEWF♯WG♯
What is true of it
G♯ Phrygian dominant is G♯, A, B♯, C♯, D♯, E and F♯, and back to G♯.
Its steps are H – W+H – H – W – H – W – W, where W is a whole step and H a half.
On the same tonic, G♯ Phrygian differs from it by exactly one note.
Chords made only of these notes
C♯mminorD♯dimdiminishedD♯m7♭5half-diminished seventhEaugaugmentedF♯mminorF♯dimdiminishedF♯m7minor seventhF♯m7♭5half-diminished seventh
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on G♯
G♯ Lydian dominantexoticG♯ alteredexoticG♯ double harmonicexoticG♯ majormajorG♯ natural minorminorG♯ harmonic minorminor
C phr domC♯ phr domD♭ phr domD phr domD♯ phr domE♭ phr domE phr domF phr domall 374