The F#6 mandolin chord contains F#, A#, C#, D#. Its first mandolin voicing is the open position: G string at fret 3 (ring finger); D string at fret 1 (index finger); A string at fret 4 (little finger); E string at fret 2 (middle finger). As a major 6th chord it has a distinct job in a progression, and this page explains that job alongside the fingerings, the notes and the practice steps that make it stick.
What notes are in the F#6 chord?
The F#6 chord is a major 6th chord, and its notes are fixed: F#, A#, C#, D#. 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#6 at a glance. On the mandolin, start with the first voicing above and listen for the notes F#, A#, C#, D# in F#6.
| Note | Interval |
|---|---|
| F# | Root |
| A# | 3 |
| C# | 5 |
| D# | 6 |
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#6 are 3, 5, 6. Once you know the intervals, you can build F#6 from any root by counting the same semitone steps, which is how the chord works in every key. On the mandolin, the notes appear in the order the fingering dictates, but the set of notes never changes.
F#6 sounds mellow and open, a major chord with an extra note that adds warmth without adding tension. 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 mandolin, the open position of F#6 puts those notes under your fingers in the order the fingering lists them.
Comparing F#6 with its closest relatives helps to fix it in your ear. In short, 6th against major 7th: F#6 adds the 6th D#; the major 7th chord adds F instead. The 6th sounds warmer and more old-fashioned; the 7th sounds dreamier. Practise the two chords back to back and listen to the one note that changes — that single note is the difference between the two chords. On the mandolin, start with the first voicing above and listen for the notes F#, A#, C#, D# in F#6.
How to play F#6 on mandolin
On the mandolin, F#6 has 3 voicings in the data below, and each one uses the same notes — F#, A#, C#, D# — in a different place on the neck. There are 3 voicings listed for F#6 on the mandolin; learn the first, then add the others as you need them. 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.
Another way to play F#6 is the open position, in open position: G string at fret 3 (ring finger); D string at fret 1 (index finger); A string at fret 4 (little finger); E string at fret 2 (middle finger). The stretch is the challenge: the fretted notes span from fret 1 to fret 4, 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#6 — F#, A#, C#, D# — sounds, with no buzz and no accidental open string.
For the barre chord, F#6 sits in open position: G string at fret 3 (ring finger); D string at fret 1 (index finger); A string at fret 1 (index finger); E string at fret 2 (middle finger). It barres across strings 2 to 3 at fret 1 with the index finger. The barre is the hard part: the index finger must press every string from 2 to 3 evenly at fret 1, 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#6 — F#, A#, C#, D# — sounds, with no buzz and no accidental open string.
Another way to play F#6 is the movable voicing, in around fret 4: G string muted; D string at fret 4 (index finger); A string at fret 6 (middle finger); E string at fret 6 (middle finger). The challenge here is the muted string: 1 string is marked x, and it needs to stay silent. Let the edge of a fretting finger rest lightly on it — muting by touch, not by pressing. Strum or pluck it slowly first and check that every note in F#6 — F#, A#, C#, D# — sounds, with no buzz and no accidental open string.
Choosing between the voicings of F#6 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#6 up the neck to any key without changing the shape. When you change chords, pick the voicing of F#6 that sits closest to the chord before it — shorter moves between shapes mean faster, cleaner changes. Practise the change into F#6 from the chord that comes before it in your song, not the chord on its own, because the move is the skill. On the mandolin, start with the first voicing above and listen for the notes F#, A#, C#, D# in F#6.
A short practice routine for F#6 on the mandolin: 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 Mandolin Chord Finder to see the diagram for F#6 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#6 sound wrong on the mandolin, and each one has a concrete fix. Work through them one at a time rather than trying to fix everything at once.
Missing one string of a course. Mandolin strings come in pairs, and F#6 needs both strings of each course to sound. If one string of a pair is muted by a neighbouring finger, the chord sounds thin. Check each course separately by plucking it on its own. On the mandolin, the open position voicing is the place to hear it in F#6.
Confusing the 6th with the 7th. The added note here is D#, a whole step above the 5th, not the 7th. Play F and you have a different chord. On the mandolin, start with the first voicing above and listen for the notes F#, A#, C#, D# in F#6.
Burying the 6th. D# is the colour note of this chord. If it is muted or too quiet, the chord is just a major triad and the vintage warmth is gone. On the mandolin, the open position voicing is the place to hear it in F#6.
Using it as a dominant. F#6 is a tonic colour, not a dominant. It does not pull to a resolution the way a dominant 7th does. On the mandolin, the open position voicing is the place to hear it in F#6.
Where F#6 is used
F#6 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. the I or IV chord in major keys, giving a progression a vintage, relaxed feel. 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#6 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the mandolin, start with the first voicing above and listen for the notes F#, A#, C#, D# in F#6.
Because F#6 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#6 in a progression in any key and hear how it connects to the chords around it. On the mandolin, the open position of F#6 puts those notes under your fingers in the order the fingering lists them.
The same chord on other instruments is covered in F#6 on guitar, F#6 on piano, F#6 on ukulele, and the scales that fit over it are the F# major scale and the F# minor pentatonic scale. Learning F#6 on the mandolin and then checking it on another instrument is one of the best ways to fix the notes — F#, A#, C#, D# — in your memory, because the notes stay the same while everything else changes.
Practising F#6
A short worked example makes F#6 concrete. Play the four-chord progression B – F# – G#m – E in B major, the key F#6 most often resolves toward: B – F# – G#m – E. Play each chord for one bar at a slow tempo, and listen to how F#6 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#6 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the mandolin, the open position voicing is the place to hear it in F#6.
For a second exercise, play F#6 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#6 is built for when it acts as a dominant. Finish by playing F#6 on its own, slowly, and naming each note out loud as you play it: F#, A#, C#, D#. 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 mandolin, the open position of F#6 puts those notes under your fingers in the order the fingering lists them.
Frequently asked questions
What does the 6 mean in F#6?
The 6 means the 6th note of the scale, D#, is added to the major triad. F#6 contains F#, A#, C#, D#: root, major 3rd, perfect 5th and the added 6th. On the mandolin, the voicings above put that note under your fingers.
Is F#6 a major chord?
Yes. F#6 is a major triad (F#, A#, C#) with the 6th D# added. It sounds major, warm and a little nostalgic. On the mandolin, the voicings above put that note under your fingers.
What is the difference between F#6 and F#maj7?
F#6 adds the 6th D#; F#maj7 adds the major 7th F. The 6th chord sounds warmer and more old-fashioned, the maj7 sounds dreamier and more modern. On the mandolin, the voicings above put that note under your fingers.
How do you play F#6 on the mandolin?
The first voicing is the open position: frets 3–1–4–2, fingers 3–1–4–2, on the mandolin. That voicing uses the notes F#, A#, C#, D#, and it is the one to learn first. The page above lists more voicings for F#6, so you can choose the shape nearest the chords around it.
Is F#6 hard to play on the mandolin?
It depends on the voicing. The first voicing of F#6 on the mandolin 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.