To play F#sus4 on the mandolin, you need the notes F#, B, C#. Its first mandolin voicing is the movable voicing: G string at fret 4 (middle finger); D string at fret 4 (middle finger); A string at fret 4 (middle finger); E string at fret 2 (index finger). This guide covers the suspended 4th chord in full: what is in it, how to play it cleanly on the mandolin, where it fits musically and how to practise it.
What notes are in the F#sus4 chord?
The F#sus4 chord is a suspended 4th chord, and its notes are fixed: F#, B, C#. 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#sus4 at a glance. On the mandolin, start with the first voicing above and listen for the notes F#, B, C# in F#sus4.
| Note | Interval |
|---|---|
| F# | Root |
| B | 4 |
| C# | 5 |
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#sus4 are 4, 5. Learn those intervals rather than memorising the shape alone, because the same interval pattern transposed to another root gives you the same quality of chord anywhere. On the mandolin, the notes appear in the order the fingering dictates, but the set of notes never changes.
F#sus4 sounds open but restless, the classic suspended sound that every listener recognises as unfinished business. The colour is strongest when all the notes ring clearly. A muted chord tone, especially the 3rd or the 7th where the chord has one, flattens the character of F#sus4 noticeably. On the mandolin, start with the first voicing above and listen for the notes F#, B, C# in F#sus4.
Comparing F#sus4 with its closest relatives helps to fix it in your ear. In short, sus4 against sus2: F#sus4 uses the 4th B where the sus2 uses the 2nd G#. The sus4 is tenser and its resolution to the 3rd is more dramatic. 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#, B, C# in F#sus4.
How to play F#sus4 on mandolin
On the mandolin, F#sus4 has 3 voicings in the data below, and each one uses the same notes — F#, B, C# — 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#sus4 in around fret 2: G string at fret 4 (middle finger); D string at fret 4 (middle finger); A string at fret 4 (middle finger); E string at fret 2 (index finger). This voicing is comfortable because the fretted notes sit close together, from fret 2 to fret 4, so your hand stays relaxed and every note can ring. Strum or pluck it slowly first and check that every note in F#sus4 — F#, B, C# — sounds, with no buzz and no accidental open string.
Another way to play F#sus4 is the barre chord, in around fret 4: G string muted; D string at fret 4 (index finger); A string at fret 4 (index finger); E string at fret 7 (middle finger). It barres across strings 2 to 3 at fret 4 with the index finger. The barre is the hard part: the index finger must press every string from 2 to 3 evenly at fret 4, 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#sus4 — F#, B, C# — sounds, with no buzz and no accidental open string.
The movable voicing puts F#sus4 in around fret 2: G string at fret 4 (middle finger); D string muted; A string at fret 4 (ring finger); E string at fret 2 (index 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#sus4 — F#, B, C# — sounds, with no buzz and no accidental open string.
Choosing between the voicings of F#sus4 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#sus4 up the neck to any key without changing the shape. When you change chords, pick the voicing of F#sus4 that sits closest to the chord before it — shorter moves between shapes mean faster, cleaner changes. Practise the change into F#sus4 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, the movable voicing of F#sus4 puts those notes under your fingers in the order the fingering lists them.
A short practice routine for F#sus4 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#sus4 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#sus4 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.
Never resolving the 4th. The 4th B wants to fall to A#. If you sit on the sus4 forever the chord sounds stuck. Practise the sus4-to-major move until the resolution feels natural. On the mandolin, the movable voicing of F#sus4 puts those notes under your fingers in the order the fingering lists them.
Resolving to the wrong 3rd. The sus4 resolves to the major 3rd A#, not the minor 3rd. Resolve to A and you have changed key, not resolved. On the mandolin, the movable voicing of F#sus4 puts those notes under your fingers in the order the fingering lists them.
Playing the 3rd as well. If A# sounds together with B the chord clashes badly. The 3rd must be absent while the 4th is present. On the mandolin, the movable voicing of F#sus4 puts those notes under your fingers in the order the fingering lists them.
Hitting it too hard. A sus4 played at full volume can sound harsh. Play it a touch softer than the chord it resolves to. On the mandolin, start with the first voicing above and listen for the notes F#, B, C# in F#sus4.
Where F#sus4 is used
F#sus4 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. a dominant colour too, as the 7sus4, where the suspension sits on top of a dominant 7th. 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#sus4 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the mandolin, the movable voicing of F#sus4 puts those notes under your fingers in the order the fingering lists them.
Because F#sus4 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#sus4 in a progression in any key and hear how it connects to the chords around it. On the mandolin, start with the first voicing above and listen for the notes F#, B, C# in F#sus4.
The same chord on other instruments is covered in F#sus4 on guitar, F#sus4 on piano, F#sus4 on ukulele, and the scales that fit over it are the F# major scale and the F# minor pentatonic scale. Learning F#sus4 on the mandolin and then checking it on another instrument is one of the best ways to fix the notes — F#, B, C# — in your memory, because the notes stay the same while everything else changes.
Practising F#sus4
A short worked example makes F#sus4 concrete. Play the four-chord progression B – F# – G#m – E in B major, the key F#sus4 most often resolves toward: B – F# – G#m – E. Play each chord for one bar at a slow tempo, and listen to how F#sus4 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#sus4 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the mandolin, start with the first voicing above and listen for the notes F#, B, C# in F#sus4.
For a second exercise, play F#sus4 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#sus4 is built for when it acts as a dominant. Finish by playing F#sus4 on its own, slowly, and naming each note out loud as you play it: F#, B, C#. 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 movable voicing voicing is the place to hear it in F#sus4.
Frequently asked questions
Is F#sus4 hard to play on the mandolin?
It depends on the voicing. The first voicing of F#sus4 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.
What is the easiest voicing of F#sus4 on the mandolin?
The movable voicing is the easiest voicing listed for F#sus4 on the mandolin: frets 4–4–4–2, fingers 2–2–2–1. Learn that shape first, get every note ringing cleanly, and only then move on to the alternative voicings further up the neck.
What does sus4 mean in F#sus4?
Sus4 means the 3rd of the chord is suspended — replaced by the 4th, B. F#sus4 contains F#, B, C#, and the 4th is the note that makes it sound tense and unresolved. On the mandolin, check the first voicing above for that note.
How do you resolve F#sus4?
Let the 4th B fall by a semitone to the major 3rd A#. That one-step move, sus4 to major, is the classic resolution and the sound every listener expects. On the mandolin, check the first voicing above for that note.
Is F#sus4 major or minor?
Neither, while it is suspended: it has no 3rd. It usually resolves to the major triad, which is why it is most often heard as a delayed major chord. On the mandolin, check the first voicing above for that note.