C♯ Lydian dominant

C♯1D♯2E♯3F𝄪♯4G♯5A♯6B♭7

Raised fourth and flattened seventh at once — the fourth mode of melodic minor.

The same sounds spelled from the other side are D♭ Lydian dominant.

on guitar on piano

Written out

Fig. 2 · C# Lydian dominant, ascending

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♯WD♯WE♯WF𝄪HG♯WA♯HBWC♯

What is true of it

C♯ Lydian dominant is C♯, D♯, E♯, F𝄪, G♯, A♯ and B, and back to C♯.

Its steps are W – W – W – H – W – H – W, where W is a whole step and H a half.

Written correctly it needs 7 alterations, F𝄪 among them. That is what the letters force, and it is also why nobody writes music in this key: the same notes spelled from the other side are easier to read.

On the same tonic, C♯ Lydian differs from it by exactly one note.

Across the first twelve frets of the ukulele its notes fall in 29 places, which is what makes a scale a shape rather than a list.

Chords made only of these notes

C♯major C♯7dominant seventh D♯major D♯augaugmented D♯7dominant seventh G♯mminor A♯mminor A♯m7minor seventh

Found by testing every chord in the catalogue against these 7 sounds, not chosen.

Other scales on C♯

C♯ Phrygian dominantexotic C♯ alteredexotic C♯ double harmonicexotic C♯ majormajor C♯ natural minorminor C♯ harmonic minorminor

C lyd dom D lyd dom D♯ lyd dom E♭ lyd dom E lyd dom F lyd dom F♯ lyd dom G♭ lyd dom all 374