piano scale
G♯ altered
G♯1A♭2B♭3C♭4D♭5E♭6F♯♭7
The seventh mode of melodic minor. Every degree above the tonic that can be altered, is.
The same sounds spelled from the other side are A♭ altered.
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♯HAWBHCWDWEWF♯WG♯
What is true of it
G♯ altered is G♯, A, B, C, D, E and F♯, and back to G♯.
Its steps are H – W – H – W – W – W – W, where W is a whole step and H a half.
On the same tonic, G♯ Locrian differs from it by exactly one note.
Chords made only of these notes
CaugaugmentedDmajorD7dominant seventhEmajorEaugaugmentedE7dominant seventhF♯dimdiminishedF♯m7♭5half-diminished seventh
Found by testing every chord in the catalogue against these 7 sounds, not chosen.