guitar scale
C♯ altered
C♯1D♭2E♭3F♭4G♭5A♭6B♭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 D♭ 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
C♯HDWEHFWGWAWBWC♯
What is true of it
C♯ altered is C♯, D, E, F, G, A and B, and back to C♯.
Its steps are H – W – H – W – W – W – W, where W is a whole step and H a half.
On the same tonic, C♯ Locrian differs from it by exactly one note.
Across the first twelve frets of the guitar its notes fall in 48 places, which is what makes a scale a shape rather than a list.
Chords made only of these notes
C♯dimdiminishedC♯augaugmentedC♯m7♭5half-diminished seventhDmminorEmminorEm7minor seventhFaugaugmentedGmajor
Found by testing every chord in the catalogue against these 7 sounds, not chosen.