A Major Ninth Bass Arpeggio
Bass arpeggio — fretboard diagram
A Major Ninth Arpeggio — Notes and Intervals
Notes: A, C#, E, G#, B
Intervals: 1P, 3M, 5P, 7M, 9M
Formula: 2W-WH-2W-WH
Number of notes: 5
Also known as: maj9, Δ9, ^9
The A Major Ninth arpeggio contains 5 notes (A, C#, E, G#, B). Use the interactive fretboard above to explore this arpeggio on Bass with different tunings and fret ranges.
When to Use the A Major Ninth Arpeggio
Play the A Major Ninth arpeggio whenever a A Major Ninth 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 Major Ninth arpeggio uses 5 notes (A, 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 A Major Ninth Arpeggio on Bass
On bass, locate A on the E string at fret 5. Span the 5 notes (A, C#, E, G#, B) across two to three strings using one finger per fret. Focus on even tone production between plucked strings and smooth position shifts.
The A Major Ninth arpeggio outlines a A major chord and works perfectly over A, Amaj7, A6 harmonies. It is a foundational arpeggio for soloing over major-key progressions and emphasizes the bright, resolved character of the major triad.
Practice Routine
Play the A Major Ninth arpeggio as whole notes over a backing track or drone on A. Focus on intonation and tone quality for each of the 5 notes (A, C#, E, G#, B). After a few passes, begin improvising short melodic phrases built from these arpeggio tones, connecting them with passing notes.
Bass Tips
Practice the A Major Ninth 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.