Harmonic Minor for Trap Melodies: The Raised Seventh Explained

What is the harmonic minor scale?

The harmonic minor scale is the natural minor scale with its seventh degree raised by a semitone, from a minor seventh to a major seventh. Its steps run whole, half, whole, whole, half, augmented second, half.^[1]

In semitones above the root the recipe is 0 2 3 5 7 8 11. Natural minor is 0 2 3 5 7 8 10. One note moves up, and two things happen at once: the scale gains a leading tone, and a wide gap opens between the sixth and seventh degrees. Both matter for trap.

Harmonic minor is one of three minor scales musicians use. The Open University's theory course notes that harmonic minor keeps the same structure going up and down, while melodic minor changes direction: it raises the sixth and seventh on the way up and uses natural minor on the way down.^[2]

What does the raised seventh do in a minor key?

The raised seventh sits a semitone below the tonic instead of a whole tone, so it works as a leading tone that pulls hard into the root.^[1] It also changes the chord built on the fifth degree from minor to major.

In A natural minor the v chord is E minor (E G B), a soft chord with little pull. In A harmonic minor it becomes E major (E G# B), or E7 with a D on top. That major V chord resolving to A minor is the firmest way to land a minor key, and it is the sound of a trap loop that snaps back to bar one.

The same G# creates a diminished chord on the seventh degree, G#dim or G#dim7 (G# B D F). Every note in it sits a minor third from the next, so it sounds suspended and unstable. Use it for one beat before the loop restarts, and it reads as a horror-movie sting.

Mix, don't replace

You rarely need a whole trap loop in harmonic minor. A common approach is to write in natural minor and switch the seventh to its raised form only over the V chord or in the last bar of the phrase. G natural over Am and F chords, G# over E: that simple rule keeps the loop dark and makes the turnaround hit.

Why does harmonic minor sound exotic?

Harmonic minor sounds exotic because of the augmented second between the sixth and seventh degrees, a gap of three semitones inside a scale that otherwise moves in whole and half steps.^[3] In A minor that is F to G#, which the Open University describes as "a tone plus a semitone".^[2]

Classical theory treats that leap as a problem and calls it melodically awkward.^[3] Trap producers treat it as a feature. A melody that slides F, G#, A in quick sixteenths has a snake-charmer quality that no other common scale produces.

The connection to Middle Eastern and flamenco sounds runs through harmonic minor's fifth mode, Phrygian dominant, also known as Hijaz.^[4] Play A harmonic minor starting and ending on E and you are playing E Phrygian dominant. The Phrygian mode guide covers when to center a beat on that fifth degree instead.

Harmonic minor in the most common trap keys

To build harmonic minor on any root, write out natural minor and raise the seventh note by a half step. The table covers seven keys producers use constantly, with the raised note and the major V chord it creates.

Which chord progressions use harmonic minor?

Harmonic minor progressions are ordinary minor progressions that end on a major V chord. In A minor the useful chords are Am, Dm, F, E and G#dim, and the E chord is the one that needs the raised seventh.

• i to V (Am to E) The simplest version. Two bars of Am, two bars of E. Put the melody's G# on the E bars and the loop pulls back to Am every time.
• i to VI to V (Am, F, E) A dark trap and drill staple. F to E is a half-step fall in the bass, and the G# over E sharpens it. Give Am two bars, F and E one each.
• i to iv to V (Am, Dm, E) More classical and cinematic. Works with strings, choirs and piano. Voice Dm with F on top so it moves by half step to G# over E.
• i to VI to iv to V (Am, F, Dm, E) A four-bar loop with a strong turnaround. Keep bars one to three in natural minor and save every G# for bar four.
• Diminished passing chord (G#dim7 to Am) Slip G#dim7 in on the last beat before the loop restarts. It works as a quick suspense hit on bells or orchestral stabs.

For voicings that sit well under hi-hats and 808s, the trap piano chords guide covers spacing and inversions.

How do you write a harmonic minor trap or drill melody?

Write a harmonic minor trap melody by building the first three bars in natural minor, then using the raised seventh and the augmented second in the bar that leads back to the top. These patterns cover most of what you need.

• Leading-tone turn (1, 7, 1) A, G#, A on a bell or pluck. The most direct way to state harmonic minor, perfect as a pickup into bar one.
• Augmented-second run (b6, 7, 1) F, G#, A in fast sixteenths, or the reverse falling from A. This is the exotic snake line, best used once per loop.
• V7 arpeggio (5, 7, 2, 4) E, G#, B, D across the E bar. Resolve the D down to C or the G# up to A on the downbeat.
• Diminished drop G#, B, D, F falling back to E or A. Every step is a minor third, so it sounds like the floor giving way.

1. Set the key
   In Ableton Live 12, turn on Scale Mode and pick the Root Note and Scale Name; Fold to Scale hides everything outside it.^[5] If you fold to natural minor, unfold for the bar that needs the raised seventh.
2. Lay the chords
   Program Am, F, Dm, E, one bar each, at 140 BPM with half-time drums. Keep the pad quiet; it is a reference, not the lead.
3. Write bars one to three
   Use only A natural minor. Keep motifs to two to four notes with rests, as in a dark trap melody from scratch.
4. Turn bar four
   Over the E chord, use G# at least once: a leading-tone turn or the F to G# run. End on G# so the loop restart lands on A.
5. Match the 808
   Follow the chord roots, A, F, D, E. In drill, slide the 808 from E up to A across the bar line. Drill stab and string ideas are in drill strings and stabs.

Harmonic minor vs melodic minor: which should you use?

Use harmonic minor when you want menace and an exotic edge, and melodic minor when you want a smooth, emotional climb without the augmented-second leap. Melodic minor raises both the sixth and seventh going up and returns to natural minor coming down.^[3] The ascending form is sometimes called the jazz minor scale.^[3]

• Harmonic minor Dark trap, drill, horror-tinged intros, anything that needs a sting before the drop. Keep the F to G# gap audible.
• Melodic minor Emotional melodic rap, R&B-leaning trap, piano runs that rise into a hook. F# to G# to A glides without the exotic jump.
• Natural minor The base layer for both. Most of your loop lives here, and the other two are spices for specific bars.