There is no secret chord that makes music sound epic. There is a small family of progressions that keep appearing in film and trailer scoring, and a set of reasons why they work. Once you know the reasons, you can build your own instead of borrowing.

Everything here is written in Roman numerals, because a progression is a shape rather than a set of specific chords. Uppercase means major, lowercase means minor. In A minor, i is Am, VI is F, VII is G, III is C. Learn the shape and it works in every key.

Why minor, and which minor

Minor is the default in this idiom for a reason that is structural rather than emotional. A major key has one strong pull. Everything wants to go home to the tonic, and it gets there quickly. Natural minor has several chords that could plausibly feel like a destination, so the music can keep moving without ever arriving. That irresolution is exactly what a two-minute build needs.

But which minor changes the colour considerably, and the difference is usually a single note.

Mode	The note that does it	Character
Natural minor (Aeolian)	none	The standard. Heroic, open, works everywhere.
Dorian	Raised 6th	Less tragic, more resolute. Action rather than loss.
Phrygian	Lowered 2nd	Menace, the antagonist, the ancient. Strong flavour, so use it in small doses.
Harmonic minor	Raised 7th	Gothic. Powerful and easy to overcook.
Aeolian with a major IV	Borrowed from Dorian	The lift. One chord, large effect.

The core family

Five shapes cover most of what you hear. Several are rotations of the same set of chords, but they behave differently because of where they start and end.

i – VI – III – VII

In A minor: Am – F – C – G. The most common progression in the idiom, and the one that sounds most unambiguously like film music.

It works because it never resolves. Each chord is one step of a descending cycle, and the last chord (VII) leads straight back to the first with strong forward pull. You can loop it indefinitely and the ear will not tire of it, because it is never told the phrase is finished.

i – VII – VI – VII

Am – G – F – G. Narrower, and more insistent. Because it turns around on VII rather than completing a cycle, it feels like it is straining rather than travelling, which is useful under a build where the picture is holding tension.

Swap the last chord for VI and you get i – VII – VI – VI, which sags. Swap it for III and the phrase lifts. The final chord of a four-bar loop is where nearly all the character lives; if a progression is not working, change that one first.

VI – VII – i

F – G – Am. The cadence rather than a full progression: the three chords that end a section. Two stepwise major chords rising into the minor tonic, and it is the most reliable arrival in the whole vocabulary.

Its power comes from the two major chords in a row. Minor keys are mostly minor chords; two bright ones adjacent, both rising, is a surge, and the landing on the minor tonic keeps it from tipping into triumph. Nearly every trailer cue ends on some version of this.

i – VII – VI – V (the descent)

Am – G – F – E. The bass walks down A – G – F – E, four steps, and the last chord is major, E rather than Em, which is the whole point. That major V after three minor-key chords is a shock of brightness that immediately wants to fall back to the tonic.

The shape is centuries old and instantly recognisable: flamenco, baroque laments, and a great deal of scoring for anything ancient, Mediterranean or doomed. Used plainly it can sound like pastiche. Used with the descent in the bass only, while the upper harmony does something else, it is one of the strongest devices available.

i – III – VII – VI

Am – C – G – F. The rotation that starts by opening upward rather than downward. Because the second chord is the relative major, the progression sounds hopeful before it sinks, which makes it the natural choice for the section of a cue where something is being established rather than resolved.

The borrowed major fourth

If there is one trick in this article worth taking away, it is this one.

In natural minor, the fourth chord is minor: in A minor, Dm. Borrow the major version from Dorian, so it becomes D major, and the effect is out of all proportion to the size of the change. One note moves by a semitone, F becoming F♯, and the progression lifts.

Am – F – C – G is solid. Am – F – C – D is the same progression with a window opened in it. The raised note is the leading tone of the fifth, so it introduces a brightness the key does not own, and the ear registers that as hope, distance, or scale depending on what is around it.

One borrowed chord in an otherwise diatonic progression does more than four unusual ones. Contrast is the whole mechanism.

Pedal point

Hold one note in the bass while the harmony moves above it.

The bass stays on the tonic, A in A minor, for eight or sixteen bars while the upper parts move through F, C, G and back. The chords above are ordinary. The friction between them and the unmoving bass is what makes the passage feel enormous.

Two reasons it works so reliably. First, a stationary bass removes the sense of arrival. Nothing can resolve while the root never moves, so tension accumulates with nothing to release it. Second, it makes every chord above it function as a colour over a single harmony rather than as a step in a journey, which is exactly the harmonic stasis that reads as monumental.

The release is the point. After sixteen bars of pedal, the first bar where the bass finally moves is the biggest moment in the cue, and it cost nothing but patience.

Chromatic mediants

This is the sound most people mean when they say a score sounds "cinematic" and cannot say why.

A mediant relationship is two chords a third apart. A chromatic mediant is two chords a third apart that share exactly one note and belong to different keys: C major and A♭ major, for instance, or C major and E major.

The move sounds like a shift of perspective rather than a step in a progression. There is no functional pull between the two chords, so the ear does not hear a journey; it hears a change of scene. That is why the device dominates anything to do with wonder, scale, space and revelation.

Three that are worth having under your fingers, from C major:

• C to A♭: down a major third. Darkening, weight, threat.
• C to E: up a major third. Brightening, awe, sudden expansion.
• C to E♭: up a minor third. Unsettled, mysterious, neither dark nor bright.

Use one per cue. They are strong enough that a second reduces the effect of the first, and a third turns the cue into an exercise in modulation.

Suspensions

A suspension is a note held over from the previous chord that does not belong to the new one, and then resolves down by step.

In practice, the two you will use constantly are sus4, replacing the third with the fourth so A–C–E becomes A–D–E, and sus2, replacing the third with the second to give A–B–E. Both remove the third, which is the note that tells the ear whether a chord is major or minor. A chord with no third is ambiguous, open, and unfinished, and those three qualities are most of what people mean by the word "epic".

Where to put them:

• Sus4 resolving to the triad on the next beat: the classic. Tension and release inside a single chord.
• Sus2 left unresolved: hanging, contemporary, extremely common in minimal and ambient underscore.
• Sus4 on the final chord of a phrase, never resolved: the phrase does not close, so the cue keeps moving forward.

Adding a ninth does much the same job with a different flavour: it is colour rather than tension, because it does not remove the third. An Am with a B on top is still unmistakably minor, just wider.

The bass line is the real progression

Chord symbols describe stacks of notes. The ear largely follows the bottom one, and two progressions with identical symbols can behave completely differently depending on what the bass does.

Take Am – F – C – G. Played with roots in the bass, the bass jumps A – F – C – G: down a third, down a fourth, up a fifth. It is functional and slightly lumpy. Now put the F in first inversion, so the bass note is A, and the C in second inversion, so the bass is G. The bass now reads A – A – G – G, and the same four chords sound like a single sustained gesture rather than four events.

Or aim for stepwise motion. Am – Am/G – F – E gives a bass of A – G – F – E: four steps down. Three of those chords are unchanged from the original progression; only the bass note under the second one moved, and the whole thing now sounds composed rather than assembled.

This is the most under-used tool in the list. Before reaching for different chords, try the same chords over a different bass.

Two-chord loops

A great deal of effective scoring uses two chords and nothing else. Fewer chords means slower harmonic rhythm, which means larger scale, and it leaves the ostinato and the orchestration to do the work.

• i – VI: Am to F. Open, unresolved, endlessly loopable. The default two-chord shape.
• i – VII: Am to G. More forward pull, because VII wants to return to i.
• i – IV (major): Am to D. The borrowed fourth again, now as half the progression. Bright and strange in equal measure.
• i – ♭II: Am to B♭. Phrygian, menacing, one semitone of movement in the bass. Very strong flavour.

The discipline with a two-chord loop is that nothing can hide. If the figure over the top is not interesting, there is no chord change coming along to rescue it.

Where the melody sits

The highest sounding note of a chord is heard as melody whether one was written or not. Which means the progression's character is set as much by the top line as by the chords underneath it.

Over Am – F – C – G, hold a single A in the top voice through all four chords. It is the root of Am, the third of F, the sixth of C and the ninth of G. Four different functions, one unmoving note, and the progression sounds like it is being observed from a fixed point. That is a pedal point applied to the top of the texture rather than the bottom, and it is just as effective.

Now move the top voice stepwise instead: A over Am, A over F, G over C, G over G. Almost nothing happens, and the progression gains a sense of line. Compare either to a top voice that simply plays the root of each chord, which is what happens by default, and the difference is the gap between an arrangement and a list of chords.

Harmonic rhythm is a compositional choice

How long you stay on each chord affects the scale of the music more than the choice of chords does.

Take Am – F – C – G. One chord per bar at 90 BPM, it sounds like a song. One chord per two bars, it sounds like a scene. One chord per four bars, with an ostinato moving above it, it sounds like the opening of something very large.

The chords are identical in all three. The only variable is patience.

The structural consequence for a build: do not change the progression when you want a cue to grow. Halve the harmonic rhythm instead. It opens the music out without introducing any new material, which means all your new material is still available for later.

Modulation for the last act

Moving the whole thing up for the final section is a blunt instrument, and blunt instruments work.

• Up a whole tone: the most common and the most obvious. Effective, slightly cheap. Best hidden behind a big hit on the downbeat so nobody hears the seam.
• Up a minor third: darker and much less predictable. Shares enough notes with the original key that the move feels composed rather than mechanical.
• Down a major third: the counter-intuitive one. Moving down at the climax makes the music feel heavier rather than higher, and it is a chromatic mediant, so the shift sounds like a change of scene.

Whichever you choose, do it on a structural boundary and put something loud on the first beat. Modulations that creep in are noticed; modulations that arrive on a hit are felt.

Voicing: how to stop it sounding like a pop song

The same progression can sound like a ballad or a film score. The difference is almost entirely in how the chords are spaced and orchestrated.

• Open the spacing. Pop voicings sit close together in the middle. Spread the chord across three or four octaves: root very low, fifth above it, third high up. Same notes, entirely different scale.
• Drop the third out of the low register. Below C3 it muddies. Root and fifth at the bottom, thirds in the middle and above.
• Double the root at two octaves. Not one, two. It reads as depth rather than thickness.
• Keep something sustained above everything. A held note across the whole progression, usually the tonic or the fifth. This is what makes chords sound like a score rather than a sequence.
• Let the top voice move by step. The ear tracks the highest note as the melody whether you intended one or not. If it leaps around, the progression sounds like chords; if it moves stepwise, it sounds like writing.

Worked examples

A build, in A minor

Bars 1–8: Am – F – C – G, one chord per bar, twice. Ostinato figure above, pedal-free bass on the roots.

Bars 9–16: same four chords, one per two bars. Bass drops to a pedal A throughout. Nothing else changes and the music opens out.

Bars 17–20: F – G – Am, with the F lasting two bars. The bass finally moves off the pedal on bar 17, the largest moment so far.

Bars 21–24: Am – F – C – D. The borrowed major fourth on the last bar. The window opens.

Bars 25–32: everything, transposed up a minor third to C minor, with the same progression. Hit on the downbeat of 25.

A darker shape, in D minor

Dm – C – B♭ – A, the descent, with the major V at the end. Bass walks D – C – B♭ – A. Under a scene rather than a trailer, take it at one chord per two bars, hold a sus4 over the A so it never quite resolves, and let the whole thing repeat with the top voice a third higher each time.

A wonder cue

C – E – C – A♭. Two chromatic mediants around a tonic, one up and one down, all major. Slow, at one chord per four bars. Sustained strings, no percussion, top voice moving by step between the shared notes. No minor chords at all, and it will not sound remotely cheerful.

How to use a list like this

Not as a menu. A progression borrowed whole sounds borrowed, and the well-known ones are recognisable enough that a library editor will hear it.

The useful move is to take one mechanism at a time and apply it to something of your own: put a pedal under a progression you already have, change the last chord of the loop, borrow one major chord from a parallel mode, halve the harmonic rhythm in the second half. Each of those is a single decision, and any one of them will do more for a cue than swapping in a different four chords.