G diminished (whole–half)

G1A2B♭♭3C4D♭♭5E♭♭6E6F♯7

Eight notes alternating whole step and half step. Symmetrical, so it repeats every minor third.

Written out

Fig. 2 · G diminished (whole–half), ascending

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

GWAHB♭WCHD♭WE♭HEWF♯HG

G diminished (whole–half) is G, A, B♭, C, D♭, E♭, E and F♯, and back to G.

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

Across the first twelve frets of the guitar its notes fall in 52 places, which is what makes a scale a shape rather than a list.

Found by testing every chord in the catalogue against these 8 sounds, not chosen.