B harmonic major

Construction

Step pattern (W = whole step, H = half step): W-W-H-W-H-A-H (A = augmented second, a gap of 3 half steps).

Formula (intervals from the root): 1-2-3-4-5-b6-7.

Harmonic major is the major scale with a lowered 6th -- one alteration that introduces an augmented second between b6 and 7. The result is major harmony shadowed by an unexpected darkness, as if minor is bleeding through. The b6 is also the tone that appears when borrowing from the parallel minor key, which makes harmonic major a way of formalizing that common move into a complete scale.

Origin and Relationships

Harmonic major is a parent scale. Each of its seven modes is a scale built by starting on a different degree and treating that note as the new root:

• 1st -- Harmonic Major: Major with b6 and an augmented second.
• 2nd -- Dorian b5: Dorian with a diminished 5th -- darker and more unstable.
• 3rd -- Phrygian b4: Phrygian with a diminished 4th, rare and highly dissonant.
• 4th -- Lydian b3: Lydian character (raised 4th) with a minor 3rd -- an unusual minor-bright hybrid.
• 5th -- Mixolydian b2: Dominant scale with a b2. Functionally close to Phrygian Dominant (5th mode of harmonic minor) -- both serve dominant chords with a b2, but Mixolydian b2 has a natural 6 where Phrygian Dominant has b6.
• 6th -- Lydian Augmented #2: Lydian with both #5 and #2 -- exotic and wide-intervalled.
• 7th -- Locrian bb7: The most diminished mode, with a double-flatted 7th.

Harmonic Context

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

• I (major): Tonic triad. The b6 does not appear in the basic triad, so the tonic sounds purely major until melodies or extensions reveal the alteration.
• V7b9: The b6 of the scale becomes the b9 over V7 -- the b9 is a chord extension one half step above the root, adding dark tension to the dominant. This is the primary jazz application of harmonic major and the reason to reach for it specifically: it provides V7b9 that resolves to a major tonic. Compare to Phrygian Dominant or half-whole diminished, which also produce V7b9 but resolve naturally to minor.
• bVI+ (augmented -- raised 5th): Built on b6, the triad produced by stacking thirds from the scale is augmented (b6-1-3) -- a chord built from three major thirds -- not major. Its unstable, shimmering quality pulls strongly toward resolution.
• vii° (fully diminished -- stacked minor thirds): Built on the leading tone, creating strong pull to I -- identical in function to its harmonic minor counterpart.

Characteristic Tones

The intervals that give this scale its distinctive sound:

• b6: The single defining alteration. It drags the bright major scale into shadow, creating a bittersweet quality that sounds melancholic without abandoning major tonality. Compare to the major scale: major has a natural 6, which keeps everything sunny -- b6 clouds it.
• The b6-to-7 augmented second: The 3-half-step leap that gives harmonic scales their dramatic color. Set against major harmony here, it sounds bittersweet rather than the outright darkness it creates in minor contexts.
• 7 (leading tone): Retained from the major scale, maintaining strong resolution to 1. The tension between the leading tone's brightness and b6's darkness is the scale's emotional core.

Melodic Applications

The b6 is most powerful as a brief shadow passing through major-key phrases -- lean on it for bittersweet color, then resolve through 7 to 1. Over V7b9 resolving to a major tonic, the b6 (acting as b9) provides the altered tension that standard Mixolydian cannot. The major 3rd stays in place throughout, so the darkness sits inside brightness rather than replacing it -- this is what separates harmonic major from harmonic minor, which creates a similar interval tension but within a minor sound.

Practice Seeds

Augmented second in major. Play b6 to 7 to 1 slowly over a major chord. Hear how this 3-half-step interval introduces unexpected tension in a bright context -- the scale's defining color.

Major scale comparison. Play the major scale ascending, then harmonic major from the same root. Identify the exact moment b6 changes the mood -- one note shifts bright to bittersweet.

V7b9-to-I cadence. Improvise phrases using harmonic major over V7 resolving to a major tonic. Notice how the b6 becomes the b9 on the dominant, providing altered color that lands on a stable major I chord -- not minor.

Bittersweet melody. Compose a short major-key phrase that passes through b6 before resolving to 1. Practice controlling how much darkness you introduce -- the b6 is a color, not a destination.