A# Suspended Fourth Bass Arpeggio
Bass arpeggio — fretboard diagram
A# Suspended Fourth Arpeggio — Notes and Intervals
Notes: A#, D#, F
Intervals: 1P, 4P, 5P
Formula: 5-W
Number of notes: 3
Also known as: sus4, sus
The A# Suspended Fourth arpeggio contains 3 notes (A#, D#, F). Use the interactive fretboard above to explore this arpeggio on Bass with different tunings and fret ranges.
When to Use the A# Suspended Fourth Arpeggio
Play the A# Suspended Fourth arpeggio whenever a A# Suspended Fourth 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# Suspended Fourth arpeggio uses 3 notes (A#, D#, F) 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# Suspended Fourth Arpeggio on Bass
On bass, locate A# on the A string at fret 1. This compact 3-note arpeggio (A#, D#, F) can be played across two strings without shifting, making it ideal for building bass lines that clearly outline the harmony.
The A# Suspended Fourth arpeggio avoids the third, creating an open, unresolved sound. It works over A#sus4, A#sus2, A#7sus4 voicings and is perfect for creating a modern, ambiguous harmonic feel that neither commits to major nor minor.
Practice Routine
Practice the A# Suspended Fourth arpeggio in different octaves, starting low and working up. Then try displacing the octaves — play the root low, the D# an octave higher, and continue leaping. This trains your ear to hear the intervals (1P, 4P, 5P) in any register.
Bass Tips
Practice the A# Suspended Fourth 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.