Guitar Chord A#add4: Structure, Notes and Theory

A#add4 — a chord built on the note “A#” with a clear, stable, and versatile tone. Easily expanded with extensions for extra brightness and color. The chord includes added tones: add4 — reminiscent of sus, but without the strict need to resolve. Gives the harmony a sense of “breathing”.

Formula and Structure of the A#add4 Chord

Interval formula from the root note: 1 — 3 — 4 — 5. The chord consists of the following notes:

• Bb — unison and the main tonal anchor.
• D — major third with a bright major quality and clear stability above the tonic.
• Eb — perfect fourth with a spicy flavor, best voiced apart from the third.
• F — perfect fifth, stabilizing the triad and adding tonal grounding.

Together, these notes form the harmonic foundation of the A#add4 chord, defining its sound and role in the musical context.

Alternative Names for the A#add4 Chord

This chord may appear under different names:

• A#majadd4
• A#maadd4
• A#majoradd4

All variants refer to the same harmonic structure.

Using the A#add4 Chord

Keep the 1, 3, and 5 clear and stable to form the base. Place color tones in the top voices. Works well with gradual addition of extensions.

Conclusion

A#add4 is an expressive and versatile chord. Learn several fingerings, experiment with different positions and voice spacing, then try weaving it into your own playing — this will help you quickly find your unique tone.