C♯ Mixolydian

C♯1D♯2E♯3F♯4G♯5A♯6B♭7

Major with a flattened seventh: the scale that fits a dominant seventh chord without altering it.

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

Written out

Fig. 2 · C# Mixolydian, ascending

Every accidental is written in, rather than left to a key signature, so the letters can be read one at a time.

C♯WD♯WE♯HF♯WG♯WA♯HBWC♯

C♯ Mixolydian is C♯, D♯, E♯, F♯, G♯, A♯ and B, and back to C♯.

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

It costs 6 alterations to write — near the limit of what a key signature can carry.

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

Across the first twelve frets of the ukulele its notes fall in 28 places, which is what makes a scale a shape rather than a list.

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