Bmaj7

Construction

Built from these intervals: 1-3-5-7.

Maj7 is the major triad with an added major 7th. The 7 sits a half step below the root, creating gentle tension that keeps the chord from fully settling. The interval between the 3 and 7 is a perfect fifth, reinforcing consonance even as the 7 adds complexity.

Harmonic Function

In Roman numeral analysis (uppercase = major, lowercase = minor):

• Imaj7 -- the default jazz tonic, replacing the plain major triad in most jazz and contemporary contexts
• IVmaj7 -- shimmering subdominant heard in bossa nova and contemporary pop
• bVImaj7 -- borrowed chord in major keys, chromatic color common in neo-soul and film music

The Imaj7 is the landing chord of the ii7-V7-Imaj7 cadence (a cadence is a chord sequence that marks a phrase ending). The tritone in V7 (the interval of six half steps, between the 3 and b7 of V) resolves by half step into the root and 3 of Imaj7 -- that mechanism is why this progression sounds inevitable.

Character

As a member of the major family, maj7 is sophisticated and luminous. The 7 creates a dreamy quality -- not quite resolved, but not tense. Compare to the major triad: adding the 7 transforms straightforward brightness into something reflective. Compare to 6 (1-3-5-6): the 7 has gentle forward motion from its half-step proximity to the root, while the 6 is more settled and vintage.

Related Sounds

These chords are closely related -- each modifies one element of the maj7 structure:

• maj (1-3-5) -- remove the 7th, the stable parent triad
• maj9 (1-3-5-7-9) -- add the 9th for more openness and light
• 6 (1-3-5-6) -- the 6 replaces the 7, more settled and vintage
• add9 (1-3-5-9) -- the 9th without the 7th, brighter and simpler
• maj7#5 (1-3-#5-7) -- raise the 5th, brightness becomes ethereal

Voice Leading

Voice leading tracks how individual notes move from one chord to the next. The 7 sits a half step below the root, giving maj7 subtle forward energy even as a tonic chord.

• Imaj7 to ii7: The 7 moves down to the 5 of ii. The 5 moves down to the b3 of ii. The root and 3 carry into ii7 as the b7 and 9. Three voices connect closely.
• IVmaj7 to V7: The 7 of IV moves up a half step to become the b7 of V. The 3 of IV moves to the 3 or root of V. IV to V sets up the return home.
• Imaj7 to vi7: The root, 3, and 5 are shared -- three common tones. Only the 7 moves, stepping down a whole step to the root of vi. This is why I-vi sounds so natural.

These movements apply in any key -- the intervals are the same regardless of root.

Practice Seeds

Leading tone pull. Play the 7, then the root above it. That half-step pull is what gives maj7 its unresolved quality -- almost home, not quite.

Nearest-neighbor swap. Play maj7, then replace the 7 with a 6. Hear how maj7 gently leans forward while the 6 chord sits still. Choose based on the musical moment.

ii-V-I resolution. Play a ii7-V7-Imaj7 in any key and listen for how the tritone in V7 (the 3 and b7) resolves -- the 3 moves up to the root of I, the b7 moves down to the 3 of I. That resolution into Imaj7 is the foundation of jazz harmony.

Imaj7 to IVmaj7. Practice Imaj7 to IVmaj7 in several keys. Two shimmering chords in conversation -- the foundation of bossa nova. Listen for how the 7 of each chord pulls toward the next root.