A Diminished Bass Arpeggio
Bass arpeggio — fretboard diagram
A Diminished Arpeggio — Notes and Intervals
Notes: A, C, Eb
Intervals: 1P, 3m, 5d
Formula: WH-WH
Number of notes: 3
Also known as: dim, °, o
The A Diminished arpeggio contains 3 notes (A, C, Eb). Use the interactive fretboard above to explore this arpeggio on Bass with different tunings and fret ranges.
When to Use the A Diminished Arpeggio
Play the A Diminished arpeggio whenever a A 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 Diminished arpeggio uses 3 notes (A, C, Eb) 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 Diminished Arpeggio on Bass
On bass, locate A on the E string at fret 5. This compact 3-note arpeggio (A, C, Eb) can be played across two strings without shifting, making it ideal for building bass lines that clearly outline the harmony.
The A 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
Practice the A Diminished arpeggio in different octaves, starting low and working up. Then try displacing the octaves — play the root low, the C an octave higher, and continue leaping. This trains your ear to hear the intervals (1P, 3m, 5d) in any register.
Bass Tips
Practice the A Diminished arpeggio on bass using a raking technique across adjacent strings for a smooth, flowing sound. Then try the same shape with a two-finger alternating pluck for a more defined, punchy articulation.