piano scale
F♯ diminished (half–whole)
F♯1G♭2A♭3A♯3B♯♯4C♯5D♯6E♭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.
The same sounds spelled from the other side are G♭ diminished (half–whole).
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
F♯HGWAHA♯WB♯HC♯WD♯HEWF♯
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.
Chords made only of these notes
C♯dimdiminishedD♯majorD♯mminorD♯dimdiminishedD♯7dominant seventhD♯m7minor seventhD♯m7♭5half-diminished seventhEdimdiminished
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