About the Fdim Baritone chord
Play Fdim on Baritone ukulele with the 3 1 0 1 shape in DGBE tuning.
Place your index finger on the 1st fret of the G string, your middle finger on the 1st fret of the E string, and your pinky finger on the 3rd fret of the D string. Leave the B string open. Strum all four strings and check that each one rings cleanly.
Read the frets across D, G, B and E. A 0 means open and x means mute. These fingerings are for Baritone strings. A Standard gCEA chart uses different shapes for the same chord names.
Root
F
Quality
Diminished
Notes
F · Ab · Cb
How the Fdim chord works
F
Root (1)
The home note. It gives the chord its name.
Ab
Minor third (♭3)
The defining minor interval above the root.
Cb
Diminished fifth (♭5)
A lowered fifth that adds harmonic tension.