F#add9 Add9 Acorde

The F# Add9 chord contains: F#, A#, C#, G#.

These notes are derived by applying the add9 interval formula (0–4–7–14 semitones) to the root note F#.

Major triad with an added 9th (no 7th).

Lush, open sound popular in pop. The F#add9 chord is used across pop, rock, jazz, and classical music. As the I chord in the key of F# major, it functions as the most stable resting point in progressions.

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

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

A add9 chord has 4 notes: F#, A#, C#, G# (in F#).

It is a 7th chord, extending beyond the basic triad.

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

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

F#add9 naturally serves as the I chord in the key of F# major.

It also appears as IV in the key of C# major, and as V in the key of B major.

Yes.

The ukulele uses GCEA tuning with 4 strings. The F#add9 chord notes (F#, A#, C#, G#) 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 F# major, F#add9 pairs naturally with B major (IV), C# major (V), and D#m (vi).

The classic I–IV–V (F#add9–B–C#) is the foundation of blues, country, and rock.

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

F#add9 root position: F# in bass. First inversion: A# in bass. Second inversion: C# in bass. Inversions create smoother bass line movement without changing the harmony.

Remember the formula: 0–4–7–14 semitones from root.

For F#add9: start on F#, add 4 semitones, then 7 semitones, then 14 semitones. Practicing this across all 12 roots builds instant recognition of any add9 chord.