A# Altered Bass Arpeggio
Bass arpeggio — fretboard diagram
A# Altered Arpeggio — Notes and Intervals
Notes: A#, D, G#, B
Intervals: 1P, 3M, 7m, 9m
Formula: 2W-6-WH
Number of notes: 4
Also known as: alt7
The A# Altered arpeggio contains 4 notes (A#, D, G#, B). Use the interactive fretboard above to explore this arpeggio on Bass with different tunings and fret ranges.
When to Use the A# Altered Arpeggio
Play the A# Altered arpeggio whenever a A# Altered 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# Altered arpeggio uses 4 notes (A#, D, 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# Altered Arpeggio on Bass
On bass, locate A# on the A string at fret 1. Span the 4 notes (A#, D, 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# Altered arpeggio outlines a A#Altered chord. Playing these 4 tones (A#, D, G#, B) over the matching harmony ensures your melodic lines clearly follow the chord changes.
Practice Routine
Play the A# Altered arpeggio as whole notes over a backing track or drone on A#. Focus on intonation and tone quality for each of the 4 notes (A#, D, 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# Altered 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.