piano scale
D♯ altered
D♯1E♭2F♯♭3G♭4A♭5B♭6C♯♭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 E♭ 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
D♯HEWF♯HGWAWBWC♯WD♯
What is true of it
D♯ altered is D♯, E, F♯, G, A, B and C♯, and back to D♯.
Its steps are H – W – H – W – W – W – W, where W is a whole step and H a half.
On the same tonic, D♯ Locrian differs from it by exactly one note.
Chords made only of these notes
C♯dimdiminishedC♯m7♭5half-diminished seventhD♯dimdiminishedD♯augaugmentedD♯m7♭5half-diminished seventhEmminorF♯mminorF♯m7minor seventh
Found by testing every chord in the catalogue against these 7 sounds, not chosen.