C# Half-diminished Ukulele Arpeggio
Ukulele arpeggio — fretboard diagram
C# Half-diminished Arpeggio — Notes and Intervals
Notes: C#, E, G, B
Intervals: 1P, 3m, 5d, 7m
Formula: WH-WH-2W
Number of notes: 4
Also known as: m7b5, ø, -7b5, h7, h
The C# Half-diminished arpeggio contains 4 notes (C#, E, G, B). Use the interactive fretboard above to explore this arpeggio on Ukulele with different tunings and fret ranges.
When to Use the C# Half-diminished Arpeggio
Play the C# Half-diminished arpeggio whenever a C# Half-diminished chord appears in a progression. Unlike scales (which include passing tones), arpeggios guarantee every note you play IS a chord tone, making your solo sound harmonically precise and intentional.
Arpeggio vs. Scale
The C# Half-diminished arpeggio uses 4 notes (C#, E, G, B) while the full scale uses 7. The arpeggio is a subset — think of it as the skeleton of the scale. Practice alternating between the arpeggio and the full scale to develop a melodic vocabulary that mixes chord tones with passing tones.
How to Play C# Half-diminished Arpeggio on Ukulele
On ukulele, find C# around the open strings and play through the arpeggio tones (C#, E, G, B). You may need to move beyond a single chord shape to reach all 4 notes. Practice connecting the arpeggio tones smoothly across adjacent fret positions.
The C# Half-diminished arpeggio creates a tense, unstable sound built from minor thirds. It works over C#dim, C#dim7, C#m7b5 chords and is often used as a passing device to create dramatic tension before resolving to a stable chord.
Practice Routine
Practice the C# Half-diminished arpeggio in different octaves, starting low and working up. Then try displacing the octaves — play the root low, the E an octave higher, and continue leaping. This trains your ear to hear the intervals (1P, 3m, 5d, 7m) in any register.
Ukulele Tips
On ukulele, integrate the C# Half-diminished arpeggio into your fingerpicking by plucking through the chord shape one note at a time. This transforms a static strum into a melodic, harp-like texture that showcases each interval clearly.