Bmaj7 on the mandolin is a major 7th chord made from B, D#, F#, A#. Its first mandolin voicing is a barre chord at fret 1: G string at fret 4 (ring finger); D string at fret 1 (index finger); A string at fret 1 (index finger); E string at fret 2 (middle finger). Below you will find its notes and intervals, every usable voicing on the mandolin, the common mistakes players make with it and the keys and progressions where it belongs.
What notes are in the Bmaj7 chord?
The Bmaj7 chord is a major 7th chord, and its notes are fixed: B, D#, F#, A#. 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 B, so you can see the structure of Bmaj7 at a glance. On the mandolin, the barre chord voicing is the place to hear it in Bmaj7.
| Note | Interval |
|---|---|
| B | Root |
| D# | 3 |
| F# | 5 |
| A# | 7 |
The root is B, the note the chord is named after and the note your ear hears as home. Above it, the intervals in Bmaj7 are 3, 5, 7. That combination is what makes Bmaj7 sound the way it does: the intervals decide the colour, and the root decides the pitch. On the mandolin, the notes appear in the order the fingering dictates, but the set of notes never changes.
Bmaj7 sounds warm and open, the sound of jazz ballads and soft pop, where the major 7th colours rather than pulls. Listen for that character when you play it — if Bmaj7 does not sound that way, one of the notes is probably wrong, and the table above is the place to check. On the mandolin, start with the first voicing above and listen for the notes B, D#, F#, A# in Bmaj7.
Comparing Bmaj7 with its closest relatives helps to fix it in your ear. In short, major 7th against dominant 7th: Bmaj7 keeps the major 7th A#, while the dominant version flattens it to A. The major 7th sounds dreamy; the dominant 7th sounds restless. Play both chords slowly, one after the other, and notice which note moves. Naming that note out loud while you play is the fastest way to learn the difference. On the mandolin, start with the first voicing above and listen for the notes B, D#, F#, A# in Bmaj7.
How to play Bmaj7 on mandolin
On the mandolin, Bmaj7 has 3 voicings in the data below, and each one uses the same notes — B, D#, F#, A# — in a different place on the neck. There are 3 voicings listed for Bmaj7 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 Bmaj7 is the barre chord, in open position: G string at fret 4 (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 Bmaj7 — B, D#, F#, A# — sounds, with no buzz and no accidental open string.
The barre chord puts Bmaj7 in around fret 4: G string at fret 4 (index finger); D string at fret 4 (index finger); A string at fret 6 (middle finger); E string at fret 6 (middle finger). It barres across strings 1 to 2 at fret 4 with the index finger. The barre is the hard part: the index finger must press every string from 1 to 2 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 Bmaj7 — B, D#, F#, A# — sounds, with no buzz and no accidental open string.
For the barre chord, Bmaj7 sits in open position: G string at fret 4 (middle finger); D string at fret 1 (index finger); A string at fret 1 (index finger); E string muted. 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 Bmaj7 — B, D#, F#, A# — sounds, with no buzz and no accidental open string.
Choosing between the voicings of Bmaj7 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 Bmaj7 up the neck to any key without changing the shape. When you change chords, pick the voicing of Bmaj7 that sits closest to the chord before it — shorter moves between shapes mean faster, cleaner changes. Practise the change into Bmaj7 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 barre chord of Bmaj7 puts those notes under your fingers in the order the fingering lists them.
A short practice routine for Bmaj7 on the mandolin: play the first voicing four times slowly, checking each note, then change to it from the chord a fourth above B 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 Bmaj7 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 Bmaj7 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.
Clashing the 7th against the root. The major 7th is a semitone below the root, so voicings that put them next to each other in the same octave can sound harsh. Spread the notes out across octaves. On the mandolin, the barre chord of Bmaj7 puts those notes under your fingers in the order the fingering lists them.
Playing it like a plain triad. Leaving A# out turns this into an ordinary major chord and loses the whole point of the maj7 colour. Make the 7th audible. On the mandolin, the barre chord voicing is the place to hear it in Bmaj7.
Using it as a dominant. Bmaj7 does not pull to a tonic the way a dominant 7th does. If you need a V chord, use the dominant 7th instead. On the mandolin, the barre chord of Bmaj7 puts those notes under your fingers in the order the fingering lists them.
Missing one string of a course. Mandolin strings come in pairs, and Bmaj7 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, start with the first voicing above and listen for the notes B, D#, F#, A# in Bmaj7.
Where Bmaj7 is used
Bmaj7 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 E major, the key of F# major, the key of B major. the I or IV chord in major keys, adding warmth to progressions that would otherwise sound plain. As a dominant-type chord it also points toward E major, the key a perfect fourth above B, which is the tonic it most often resolves to. That is where Bmaj7 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 B, D#, F#, A# in Bmaj7.
Because Bmaj7 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 B 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 Bmaj7 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 B, D#, F#, A# in Bmaj7.
The same chord on other instruments is covered in Bmaj7 on guitar, Bmaj7 on piano, Bmaj7 on ukulele, and the scales that fit over it are the B major scale and the B minor pentatonic scale. Learning Bmaj7 on the mandolin and then checking it on another instrument is one of the best ways to fix the notes — B, D#, F#, A# — in your memory, because the notes stay the same while everything else changes.
Practising Bmaj7
A short worked example makes Bmaj7 concrete. Play the four-chord progression E – B – C#m – A in E major, the key Bmaj7 most often resolves toward: E – B – C#m – A. Play each chord for one bar at a slow tempo, and listen to how Bmaj7 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 Bmaj7 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 B, D#, F#, A# in Bmaj7.
For a second exercise, play Bmaj7 and then the chord a fourth above B, 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 Bmaj7 is built for when it acts as a dominant. Finish by playing Bmaj7 on its own, slowly, and naming each note out loud as you play it: B, D#, F#, A#. 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 barre chord of Bmaj7 puts those notes under your fingers in the order the fingering lists them.
Frequently asked questions
How do you play Bmaj7 on the mandolin?
The first voicing is the barre chord: frets 4–1–1–2, fingers 3–1–1–2, on the mandolin. That voicing uses the notes B, D#, F#, A#, and it is the one to learn first. The page above lists more voicings for Bmaj7, so you can choose the shape nearest the chords around it.
Is Bmaj7 hard to play on the mandolin?
It depends on the voicing. The first voicing of Bmaj7 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 Bmaj7 on the mandolin?
The barre chord is the easiest voicing listed for Bmaj7 on the mandolin: frets 4–1–1–2, fingers 3–1–1–2. Learn that shape first, get every note ringing cleanly, and only then move on to the alternative voicings further up the neck.
Is Bmaj7 a major chord?
Yes — Bmaj7 is a major 7th chord, built on a major triad (B, D#, F#) with the major 7th A# added. It sounds major, but with a dreamy, jazzy colour the plain triad does not have. On the mandolin, the voicings above put that note under your fingers.
What is the difference between Bmaj7 and B7?
Bmaj7 uses the major 7th A#; B7 uses the flattened 7th A. Bmaj7 sounds settled and shimmering, B7 sounds bluesy and wants to resolve. On the mandolin, the voicings above put that note under your fingers.