piano scale
C♯ Phrygian dominant
C♯1D♭2E♯3F♯4G♯5A♭6B♭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 D♭ 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
C♯HDW+HE♯HF♯WG♯HAWBWC♯
What is true of it
C♯ Phrygian dominant is C♯, D, E♯, F♯, G♯, A and B, and back to C♯.
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, C♯ Phrygian differs from it by exactly one note.
Chords made only of these notes
Found by testing every chord in the catalogue against these 7 sounds, not chosen.
Other scales on C♯
C♯ Lydian dominantexoticC♯ alteredexoticC♯ double harmonicexoticC♯ majormajorC♯ natural minorminorC♯ harmonic minorminor
C phr domD phr domD♯ phr domE♭ phr domE phr domF phr domF♯ phr domG♭ phr domall 374