guitar scale
F diminished (half–whole)
F1G♭♭2A♭♭3A3B♯4C5D6E♭♭7
The same eight notes started a half step earlier: the scale that spells a dominant seventh with a flat ninth and a sharp ninth at once.
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
FHG♭WA♭HAWBHCWDHE♭WF
What is true of it
F diminished (half–whole) is F, G♭, A♭, A, B, C, D and E♭, and back to F.
Its steps are H – W – H – W – H – W – H – W, where W is a whole step and H a half.
Across the first twelve frets of the guitar its notes fall in 51 places, which is what makes a scale a shape rather than a list.
Chords made only of these notes
CdimdiminishedDmajorDmminorDdimdiminishedD7dominant seventhDm7minor seventhDm7♭5half-diminished seventhE♭dimdiminished
Found by testing every chord in the catalogue against these 8 sounds, not chosen.
Other scales on F
F whole tonesymmetricF diminished (whole–half)symmetricF majormajorF natural minorminorF harmonic minorminor
C dim H-WC♯ dim H-WD♭ dim H-WD dim H-WD♯ dim H-WE♭ dim H-WE dim H-WF♯ dim H-Wall 374