A Half-diminished Cavaquinho Arpeggio
Cavaquinho arpeggio — fretboard diagram
A Half-diminished Arpeggio — Notes and Intervals
Notes: A, C, Eb, G
Intervals: 1P, 3m, 5d, 7m
Formula: WH-WH-2W
Number of notes: 4
Also known as: m7b5, ø, -7b5, h7, h
The A Half-diminished arpeggio contains 4 notes (A, C, Eb, G). Use the interactive fretboard above to explore this arpeggio on Cavaquinho with different tunings and fret ranges.
When to Use the A Half-diminished Arpeggio
Play the A Half-diminished arpeggio whenever a A 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 A Half-diminished arpeggio uses 4 notes (A, C, Eb, G) 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 A Half-diminished Arpeggio on Cavaquinho
Locate A on your instrument and play through the 4 notes of the Half-diminished arpeggio (A, C, Eb, G) slowly, ensuring each tone rings clearly before connecting them at speed.
The A Half-diminished arpeggio creates a tense, unstable sound built from minor thirds. It works over Adim, Adim7, Am7b5 chords and is often used as a passing device to create dramatic tension before resolving to a stable chord.
Practice Routine
Start by playing the A Half-diminished arpeggio ascending and descending at 60 BPM, one note per beat, using a metronome. Once even and confident, play it in eighth notes, then triplets, keeping each note articulate. Spend at least 5 minutes daily on this before moving to musical application.
Cavaquinho Tips
Practice the A Half-diminished arpeggio on your instrument at a slow, comfortable tempo, focusing on clean articulation of each of the 4 tones before gradually increasing speed.