F# Dominant 7th Sharp 9th

Symbols:F#7#9, F#7+9
Scale Degree Formula:1-3-5-♭7-♭10
Interval Stack:M3 + m3 + m3 + P4
Notes:F#, Bb, C#, E, A
Hear this chord:▸ Guitar

Construction

Using the scale degree formula, we first start with the F# major scale, and number each note in the scale starting from 1 - these are the scale degrees. Next, we use the scale degree formula, in this case 1-3-5-♭7-♭10, to select notes from our enumerated scale. When a chord requires notes that are not in the scale, this is indicated with a flat (♭) or a sharp (#) along with the scale degree; a ♭3, for instance, would be one half-step down from the 3rd scale degree.
Alternatively, we can use the interval stack to construct our chord. With this approach, we first start with the lowest note of the chord (F#), then move our first interval (M3), which brings us to our second note in the chord (Bb). We repeatedly apply each of the remaining intervals in the stack to get the full list of notes for our chord.
The diagram below shows how both the scale degree formula and interval stack methods result in the same selection of notes:
F#1G♭2G#2A♭3Bb3B4C♭5C#5D#5D#6E♭7F7F#8G♭9G#9A♭10M3m3m3P4

Similar Chords

The following chords are similar to this chord and may be a suitable replacement in certain scenarios.

Chord TypeChords
Diminished Major 7thBbdimMaj7
Dominant 6thF#7(6), A7(6)
Dominant 7thF#7
Dominant 7th Flat 9thF#7b9, A7b9
Dominant 7th Flat Five Flat 9thC7b5b9
Dominant 7th Flat ThirteenthF#7b13
Dominant 7th Sharp Five Sharp 9thF#7#5#9
Dominant 9thF#9
Major 6thAM6
Major 7th Flat ThirteenthDMaj7b13
Major 9thDM9
Minor 7thF#m7
Minor 7th Flat ThirteenthF#m7b13
Minor 9thF#m9
Six-NineA6/9

Associated Scales

This chord can be found in the following scales.

ScaleRoots
Dorian b5E
Harmonic MajorD
Locrian bb7C#
Lydian Augmented #2Bb
Lydian b3G
Mixolydian b2A
Phrygian b4F#

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