F# Dominant 9th

F#9

Notes

F# · A# · C# · E · G#

Intervals

  • RootF# (1P)
  • Major 3rdA# (3M)
  • Perfect 5thC# (5P)
  • Minor 7thE (7m)
  • Major 9thG# (9M)

Fretboard

EBGDAE357912EF#G#A#C#EC#EF#G#A#G#A#C#EF#EF#G#A#C#A#C#EF#G#EF#G#A#C#E

About

The F♯9 dominant ninth (F♯–A♯–C♯–E–G♯) extends a dominant 7 with a ninth. The G♯ adds brightness and harmonic richness without affecting the chord’s dominant function — the tritone between A♯ and E is still present and still drives resolution to B. The 3rd and ♭7 remain essential; the 5th is routinely dropped on guitar to make room for the 9th without creating a muddy cluster. Common in funk, jazz, and blues as a more colorful version of the dominant 7. Compared to F♯7, the 9th adds shimmer and modernity; the resolution tendency is identical.

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