Chord & FretF7(#9) — dominant sharp ninth
Notes in F7(#9): F – A – C – Eb – G#Formula: 1 – 3 – 5 – b7 – #9In the formula, the numbers count steps of the major scale starting from the note that names the chord; "b" lowers a half step, "#" raises one — and a slash names the bass note.
The 7(#9) layers the major third over the augmented ninth (the enharmonic of the minor third), creating an aggressive tension — the famous "Hendrix chord".
The same chord on all four instruments
Where to use it: Blues, rock and soul with an intense sound.
Every region of the neck hides more shapes of F7(#9). In Chord & Fret, you hear every shape strummed string by string, in each instrument's own voice; compare positions with their difficulty marked; and set a capo — the diagrams redraw above it. Start free. Unlock everything with Pro. Plays offline.
See the whole neck in Chord & Fret →Part of the Altered dominants family.