F♯ diminished chord
F♯dim
- F♯R
- A♭3
- C♭5
Barre · dim shape · 9th fret
What each note does
- F♯ is the root. It names the chord and is the note your ear hears as home.
- A is the minor third, a half step below the major third (A♯). That one note is the whole difference between sad and happy.
- C is the flat fifth. It pulls the chord tight and unstable, which is why diminished chords want to move somewhere.
More voicings
Triad · top 3 strings · 1st fret
Triad · middle strings · 10th fret