F♯dim7

F♯dim7 is the f# diminished 7th chord, spelled F♯ – A – C – E♭. perfectly symmetrical stacked minor thirds — the ultimate passing chord, able to resolve almost anywhere.

The keys
C4C5C6
F♯ – A – C – E♭
Practise this chord

Plug in your MIDI keyboard and let Coach Tshepho drill you on F♯dim7 — it plays the chord, names any wrong notes as you play, and moves you on when you nail it.

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What's inside F♯dim7
NoteInterval from rootDegree
F♯Root1
AMinor 3rdb3
CDiminished 5thb5
E♭Diminished 7thbb7
Inversions
PositionKeys (low → high)
Root positionG♭4 – A4 – C5 – E♭5
1st inversionA4 – C5 – E♭5 – G♭5
2nd inversionC5 – E♭5 – G♭5 – A5
3rd inversionE♭5 – G♭5 – A5 – C6
A working voicing

Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:

HandKeys
Left (shell)G♭2 – E♭3
Right (colour)A4 – C5
Where F♯dim7 lives

As the ii chord

F♯dim7 → B7 → Emaj7

Minor-family sevenths live on the ii — this is the move they were born for.

Stepwise colour

G♭ → F♯dim7 → A♭m7

Used as a passing colour between neighbouring chords.

Put F♯dim7 under your fingers

Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.

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