A#m9 9e Mineure Accord

The A# 9e Mineure chord contains: A#, C#, F, G#, C.

These notes are derived by applying the minor 9th interval formula (0–3–7–10–14 semitones) to the root note A#.

Minor 7th chord with an added 9th.

Rich texture used in neo-soul and R&B. The A#m9 chord is used across pop, rock, jazz, and classical music. As the I chord in the key of A# major, it functions as the most stable resting point in progressions.

On piano, play A#, C#, F, G#, C simultaneously.

In root position, A# is the lowest note. Inversions move the bass note up — first inversion has C# lowest, second inversion has F lowest.

A minor 9th chord has 5 notes: A#, C#, F, G#, C (in A#).

It is an extended chord with 5 or more notes.

The A# major chord (A#–D–F) uses a major third (4 semitones), giving it a bright, happy sound.

The A# minor chord (A#–C#–F) uses a minor third (3 semitones), giving it a darker, emotional sound.

A#m9 naturally serves as the I chord in the key of A# major.

It also appears as IV in the key of F major, and as V in the key of D# major.

Yes.

The ukulele uses GCEA tuning with 4 strings. The A#m9 chord notes (A#, C#, F, G#, C) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.

In the key of A# major, A#m9 pairs naturally with D# major (IV), F major (V), and Gm (vi).

The classic I–IV–V (A#m9–D#–F) is the foundation of blues, country, and rock.

An inversion places a non-root note in the bass.

A#m9 root position: A# in bass. First inversion: C# in bass. Second inversion: F in bass. Inversions create smoother bass line movement without changing the harmony.

Remember the formula: 0–3–7–10–14 semitones from root.

For A#m9: start on A#, add 3 semitones, then 7 semitones, then 10 semitones, then 14 semitones. Practicing this across all 12 roots builds instant recognition of any minor 9th chord.