F#7#5 is a 7th sharp 5th chord, and on the ukulele it is played from the notes F#, A#, D, E. Its first ukulele voicing is the movable voicing: G string at fret 3 (middle finger); C string at fret 4 (ring finger); E string at fret 2 (index finger); A string at fret 5 (little finger). This page is a complete reference for it: notes and intervals, fingerings, mistakes to avoid, the keys it belongs to and a short practice routine.
What notes are in the F#7#5 chord?
The F#7#5 chord is a 7th sharp 5th chord, and its notes are fixed: F#, A#, D, E. Every voicing on every instrument uses these same notes, in some order and in some octave — change one of them and you are playing a different chord. The table below lists each note with its interval from the root F#, so you can see the structure of F#7#5 at a glance. On the ukulele, the movable voicing voicing is the place to hear it in F#7#5.
| Note | Interval |
|---|---|
| F# | Root |
| A# | 3 |
| D | #5 |
| E | b7 |
The root is F#, the note the chord is named after and the note your ear hears as home. Above it, the intervals in F#7#5 are 3, #5, b7. Those intervals are the fingerprint of the 7th sharp 5th quality — any chord with the same interval pattern, on any root, is the same kind of chord. On the ukulele, the notes appear in the order the fingering dictates, but the set of notes never changes.
F#7#5 sounds restless and altered, the sound of a V chord with an extra push toward the tonic. That character comes straight from the intervals above, not from the instrument: the same notes on piano, guitar or ukulele carry the same colour, even though the voicing changes. On the ukulele, start with the first voicing above and listen for the notes F#, A#, D, E in F#7#5.
Comparing F#7#5 with its closest relatives helps to fix it in your ear. In short, 7#5 against dominant 7th: F#7#5 raises the 5th to D where the plain dominant 7th keeps the perfect 5th C#. The raised 5th adds lift and tension at the same time. Hearing the comparison matters more than reading it: play F#7#5, then play the chord it is compared with above, and let your ear find the note that changed. On the ukulele, the movable voicing voicing is the place to hear it in F#7#5.
How to play F#7#5 on ukulele
On the ukulele, F#7#5 has 3 voicings in the data below, and each one uses the same notes — F#, A#, D, E — in a different place on the neck. The first voicing below is the one to learn first, and the alternatives cover the rest of the neck. Finger numbers below use 1 for the index finger, 2 for the middle finger, 3 for the ring finger and 4 for the little finger, and x means the string is not played.
The movable voicing is the voicing to learn if you want F#7#5 in around fret 2: G string at fret 3 (middle finger); C string at fret 4 (ring finger); E string at fret 2 (index finger); A string at fret 5 (little finger). The stretch is the challenge: the fretted notes span from fret 2 to fret 5, so keep your thumb low behind the neck and let your fingers reach rather than squeezing the neck. Strum or pluck it slowly first and check that every note in F#7#5 — F#, A#, D, E — sounds, with no buzz and no accidental open string.
For the barre chord, F#7#5 sits in around fret 6: G string at fret 7 (middle finger); C string at fret 6 (index finger); E string at fret 6 (index finger); A string at fret 7 (ring finger). It barres across strings 2 to 3 at fret 6 with the index finger. The barre is the hard part: the index finger must press every string from 2 to 3 evenly at fret 6, so roll it slightly onto its bony side and keep it close to the fret wire. If the barre buzzes, move it a fraction closer to the fret and press from the arm, not the thumb alone. Strum or pluck it slowly first and check that every note in F#7#5 — F#, A#, D, E — sounds, with no buzz and no accidental open string.
The movable voicing puts F#7#5 in around fret 3: G string at fret 3 (index finger); C string at fret 6 (ring finger); E string open; A string at fret 5 (middle finger). The stretch is the challenge: the fretted notes span from fret 3 to fret 6, so keep your thumb low behind the neck and let your fingers reach rather than squeezing the neck. Strum or pluck it slowly first and check that every note in F#7#5 — F#, A#, D, E — sounds, with no buzz and no accidental open string.
Choosing between the voicings of F#7#5 is a musical decision, not a right-or-wrong one. The open or low-position voicing rings the most and suits strumming, while a barre or movable voicing lets you slide F#7#5 up the neck to any key without changing the shape. When you change chords, pick the voicing of F#7#5 that sits closest to the chord before it — shorter moves between shapes mean faster, cleaner changes. Practise the change into F#7#5 from the chord that comes before it in your song, not the chord on its own, because the move is the skill. On the ukulele, start with the first voicing above and listen for the notes F#, A#, D, E in F#7#5.
A short practice routine for F#7#5 on the ukulele: play the first voicing four times slowly, checking each note, then change to it from the chord a fourth above F# and back, four times, at a slow tempo. Then play the second voicing the same way. If a note buzzes, stop and fix the finger placement rather than playing through the buzz — clean notes at a slow tempo become clean notes at full tempo, while buzzes practised fast become habits. Use the Ukulele Chord Finder to see the diagram for F#7#5 while you practise, and the Chord Finder to compare it with the same chord on other instruments.
Common mistakes
These are the mistakes that most often make F#7#5 sound wrong on the ukulele, and each one has a concrete fix. Work through them one at a time rather than trying to fix everything at once.
Playing a perfect 5th. If the 5th is C# the chord is a plain dominant 7th. The sharpened 5th D is the note that makes it altered. On the ukulele, the movable voicing voicing is the place to hear it in F#7#5.
Confusing it with the augmented triad. The augmented triad has no 7th. F#7#5 adds the flattened 7th E to the augmented triad — that 7th is essential. On the ukulele, the movable voicing of F#7#5 puts those notes under your fingers in the order the fingering lists them.
Using it as a tonic. F#7#5 is an altered dominant. It wants to resolve to the tonic a fourth above its root. On the ukulele, the movable voicing voicing is the place to hear it in F#7#5.
Voicing it too low. D low down can sound muddy. Keep the sharpened 5th in a higher octave than the root. On the ukulele, start with the first voicing above and listen for the notes F#, A#, D, E in F#7#5.
Where F#7#5 is used
F#7#5 is not a diatonic triad in any major or minor key, because it is an extended or altered chord, but its base triad belongs to the key of C# major, the key of F# major, the key of B major. an altered dominant in jazz, where the sharpened 5th adds tension before a resolution. As a dominant-type chord it also points toward B major, the key a perfect fourth above F#, which is the tonic it most often resolves to. That is where F#7#5 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the ukulele, the movable voicing voicing is the place to hear it in F#7#5.
Because F#7#5 is an extended or altered chord, it appears in progressions as a colour or a dominant rather than as a diatonic staple. Try it in place of the plain F# triad in a progression you already know, and listen to how the extra notes change the feel — that substitution is the usual way extended chords enter real music. The Chord Progression Builder lets you try F#7#5 in a progression in any key and hear how it connects to the chords around it. On the ukulele, start with the first voicing above and listen for the notes F#, A#, D, E in F#7#5.
The same chord on other instruments is covered in F#7#5 on guitar, F#7#5 on piano, F#7#5 on bass, and the scales that fit over it are the F# major scale and the F# minor pentatonic scale. Learning F#7#5 on the ukulele and then checking it on another instrument is one of the best ways to fix the notes — F#, A#, D, E — in your memory, because the notes stay the same while everything else changes.
Practising F#7#5
A short worked example makes F#7#5 concrete. Play the four-chord progression B – F# – G#m – E in B major, the key F#7#5 most often resolves toward: B – F# – G#m – E. Play each chord for one bar at a slow tempo, and listen to how F#7#5 sounds in that sequence — whether it feels like home, like a lift, or like a chord on its way somewhere else. Then play the same four chords in a different order, starting on F#7#5 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the ukulele, start with the first voicing above and listen for the notes F#, A#, D, E in F#7#5.
For a second exercise, play F#7#5 and then the chord a fourth above F#, back and forth, four times each. That move — a chord and the chord a fourth above it — is the most common resolution in Western music, and it is the move F#7#5 is built for when it acts as a dominant. Finish by playing F#7#5 on its own, slowly, and naming each note out loud as you play it: F#, A#, D, E. Naming the notes while you play them is what turns a shape into knowledge you can use in any key. Test yourself with the Practice Chord Quiz and keep time with the Metronome as the tempo rises. On the ukulele, the movable voicing of F#7#5 puts those notes under your fingers in the order the fingering lists them.
Frequently asked questions
Where is F#7#5 used?
F#7#5 is an altered V chord in jazz and minor-key progressions, used before a resolution to the tonic. It adds lift and tension to a dominant chord. On the ukulele, the first voicing above shows where that note sits.
How do you play F#7#5 on the ukulele?
The first voicing is the movable voicing: frets 3–4–2–5, fingers 2–3–1–4, on the ukulele. That voicing uses the notes F#, A#, D, E, and it is the one to learn first. The page above lists more voicings for F#7#5, so you can choose the shape nearest the chords around it.
Is F#7#5 hard to play on the ukulele?
It depends on the voicing. The first voicing of F#7#5 on the ukulele is the easiest starting point, and the movable voicings further up the neck are harder because they need a barre or a wider stretch. Practise the first voicing cleanly at a slow tempo before you try the others, and the harder shapes will come more easily.
What is the easiest voicing of F#7#5 on the ukulele?
The movable voicing is the easiest voicing listed for F#7#5 on the ukulele: frets 3–4–2–5, fingers 2–3–1–4. Learn that shape first, get every note ringing cleanly, and only then move on to the alternative voicings further up the neck.
What notes are in F#7#5?
F#7#5 contains F#, A#, D, E: root F#, major 3rd A#, sharpened 5th D and flattened 7th E. The sharpened 5th is the note that makes it an altered dominant. On the ukulele, the first voicing above shows where that note sits.