On the bass, the Bmaj7 chord is the major 7th chord built from B, D#, F#, A#. On bass it is outlined with the arpeggio B, F#, B, D# — root, 5th, root, 3rd. Keep this page open while you practise: it lists the notes, every practical voicing, the mistakes that make it sound wrong and the progressions where it does its best work.
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 bass, the arpeggio B, F#, B, D# outlines Bmaj7 one note at a time.
| 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 bass, the notes appear in the order the fingering dictates, but the set of notes never changes.
Bmaj7 sounds mellow and spacious, a tonic colour that feels settled yet richer than a plain major triad. 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 bass, Bmaj7 is the arpeggio B, F#, B, D# — root, 5th, root, 3rd — and that order is the shape to learn.
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 bass, the arpeggio B, F#, B, D# outlines Bmaj7 one note at a time.
How to play Bmaj7 on bass
On the bass, Bmaj7 is not played as a full chord shape the way it is on guitar or piano. Instead you outline it with an arpeggio: the notes B, F#, B, D#, which are the chord tones of Bmaj7 in the order root, 5th, root, 3rd. That pattern is the working shape for this chord on bass, and it tells the listener exactly which chord is sounding, even though you never play all the notes at once.
Practise the arpeggio of Bmaj7 by playing B on beat one, F# on beat two, B on beat three and D# on beat four, one note per beat, letting each note ring for its full value. Then play it backwards — D#, B, F#, B — so your fingers learn the shape in both directions. The root B is the anchor: it is the note the rest of the band listens for, so land on it cleanly and on time, and let the 5th F# and the 3rd D# colour the bar without pulling attention away from the root.
Once the straight arpeggio of Bmaj7 is comfortable, try playing just the root B and the 5th F# for a whole bar, then add the 3rd D# on the last beat as a passing colour. That root-and-5th skeleton is how most bass lines outline Bmaj7 in a real song, and the full arpeggio is the version you use when the arrangement has space for it. Check the notes with the Bass Chord Finder and the Chord Finder, and practise the arpeggio against a slow metronome so the notes land exactly on the beat.
Common mistakes
These are the mistakes that most often make Bmaj7 sound wrong on the bass, and each one has a concrete fix. Work through them one at a time rather than trying to fix everything at once.
Flattening the 7th. If A# slips down to A you have the dominant 7th, a different chord with a different job. Check the 7th note carefully — it sits a semitone below the root. On the bass, play B, F#, B, D# and hear how the arpeggio spells out Bmaj7 without ever playing it as a block.
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 bass, Bmaj7 is the arpeggio B, F#, B, D# — root, 5th, root, 3rd — and that order is the shape to learn.
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 bass, the arpeggio B, F#, B, D# outlines Bmaj7 one note at a time.
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 bass, play B, F#, B, D# and hear how the arpeggio spells out Bmaj7 without ever playing it as a block.
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 bass, play B, F#, B, D# and hear how the arpeggio spells out Bmaj7 without ever playing it as a block.
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 bass, Bmaj7 is the arpeggio B, F#, B, D# — root, 5th, root, 3rd — and that order is the shape to learn.
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 bass 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 bass, play B, F#, B, D# and hear how the arpeggio spells out Bmaj7 without ever playing it as a block.
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 bass, play B, F#, B, D# and hear how the arpeggio spells out Bmaj7 without ever playing it as a block.
Frequently asked questions
Should you play the full Bmaj7 chord on bass?
Usually not. On bass the chord is outlined with the arpeggio B, F#, B, D#, not strummed as a block. Playing all the notes at once sounds muddy in the low register and hides the root, which is the note the rest of the band is listening for.
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 bass, the arpeggio above shows where that note sits.
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 bass, the arpeggio above shows where that note sits.
Where is Bmaj7 used?
Bmaj7 is most at home as a tonic chord in jazz, bossa nova and soft pop, and as the IV chord in major keys. It suits slow tempos and open voicings where its shimmer has room to breathe. On the bass, the arpeggio above shows where that note sits.
How do you play Bmaj7 on the bass?
Outline it with the arpeggio B, F#, B, D#: root, 5th, root, 3rd. Play one note per beat, with the root B on beat one, and let each note ring. That arpeggio tells the listener exactly which chord is sounding, even though you never play all the notes of Bmaj7 at once.