FRQs 3-4 – Harmonic Dictation

Overview

The AP Music Theory harmonic dictation FRQs are questions 3 and 4 of the seven free-response questions, where you hear short four-part progressions and notate the soprano line, the bass line, and the Roman numeral analysis. The whole free-response section gives you about 70 minutes and counts for 45% of your exam score, with all four dictation questions (two melodic, two harmonic) packed into the first timed-recording block of roughly 25 minutes. Each progression is short, usually around 4-8 chords, and you hear it played on piano several times with built-in pauses.

These questions are harder than melodic dictation in a specific way. Instead of tracking one line, you process several voices at once, identify the chord progression, and account for voice leading. You're not just hearing notes, you're hearing functional harmony moving in time. The good news: the exam sticks to common-practice harmony, so the progressions follow rules you've studied. If you know how harmony tends to behave, you can reason your way to answers your ears can't fully confirm.

For the full free-response picture, see the AP Music Theory exam guide, and check the melodic dictation guide for FRQs 1-2.

How Harmonic Dictation Is Scored

Points come from three independent sources: the soprano line, the bass line, and the Roman numerals. Because they're scored separately, a notation mistake in one place doesn't sink the others. That's a strategic gift. Always write down what you're sure of instead of leaving a section blank because one voice is fuzzy.

A few details that decide points:

• Roman numerals are all-or-nothing. Get the chord, the quality (uppercase for major, lowercase for minor, lowercase with ° for diminished), and the inversion figure (6, 6/4, 7, 6/5, 4/3, 4/2) all correct, or you don't earn it.
• Voices are scored against the key, not just each other. Wrong accidentals (an F natural in G major) cost the point.
• Outer voices follow common-practice rules. Parallel fifths or octaves between soprano and bass almost never happen in this style, so if your notation creates them, you probably misheard something.
• Alternative valid analyses can be accepted. A passing chord might score as a chord or as passing tones depending on context, so a defensible reading isn't automatically wrong.

Heads up: the exam stays paper-based for now, with sight-singing recorded on a school device. A hybrid digital format is planned starting with the 2026-27 exam, and the College Board will release details before then. The dictation task itself isn't changing.

How to Approach Harmonic Dictation, Step by Step

Treat each playing as a job with one focus. The recording controls your pace, so the win comes from knowing exactly what to listen for each time and using the pauses to lock in concrete notes instead of cycling through doubt.

First Playing: Get the Skeleton

Listen only for the bass line and the harmonic rhythm (how often chords change). The bass tells you more about the harmony than any other voice, because it determines each chord's inversion. Sketch the bass contour and mark where chords change. Don't chase exact pitches yet. You want the shape: where it steps, where it leaps, where the harmony moves fast or slow.

Second Playing: Lock the Bass and Find Cadences

Now notate specific bass pitches, and find your cadences. Cadences are your anchors because they're the most predictable spots. An authentic cadence (V-I) has dominant-to-tonic bass motion. A half cadence ends on the dominant. Cadences also let you work backward: if measure 4 lands on V-I, measure 3 probably holds predominant function (ii or IV).

Third Playing: Hear the Soprano

With the bass set, the soprano gets easier. The outer voices are the most audible in four-part texture, and the soprano usually carries the melody, so it's more predictable than the inner voices. Listen for how soprano relates to bass. Contrary motion (one rises while the other falls) is common and easier to track than parallel motion.

Fourth Playing: Verify and Fill Gaps

Check that your soprano and bass make sense together. Confirm chord qualities by ear: major chords sound stable, minor chords darker, diminished chords unstable. Use this last hearing to settle any spot you're still unsure about. Don't restart from scratch. Trust your earlier impressions of harmonic rhythm and overall shape, and refine them.

Timing Inside the Block

The roughly 25-minute recording covers all four dictations, which leaves each harmonic dictation around 6-7 minutes. That's tight, but you're notating two voices plus Roman numerals, not a full score. During each pause, make a concrete move. If the first hearing gave you a clean bass line, spend the pause writing it. If only the harmonic rhythm came through, sketch that. Progress beats perfection.

Reasoning Out the Roman Numerals

You don't need to hear every note to label a chord. The bass plus the key usually narrows it to a couple of options, and the soprano breaks the tie.

Say you're in C major and the bass plays C. Root position I is the obvious choice. The realistic alternatives with C in the bass are vi6 (the third of A minor in the bass) or a pedal-style IV6/4, both less common. The soprano disambiguates: if it's C, E, or G over that C bass, you've got a root-position I chord.

Match what you hear against standard progressions. The exam tests fundamental harmonic motion, not exotic chords:

• Tonic area: I, vi
• Predominant function: IV, ii, ii6
• Dominant function: V, V7, vii°6
• Common full progressions: I-IV-V-I, I-ii6-V-I, I-vi-IV-V-I

Inversions Live in the Bass

Inversions change the Roman numeral, and the bass is your guide. Root position has the root in the bass. First inversion (6) has the third in the bass. Second inversion (6/4) has the fifth in the bass. For seventh chords, third inversion (4/2) has the seventh in the bass.

The exam loves first-inversion chords because they smooth out the bass. The progression I-V6-I gives you the bass line do-ti-do, much smoother than root-position I-V-I (do-sol-do). When a bass moves mostly by step, suspect first-inversion chords.

Pattern Recognition: Bass and Soprano Tells

Common-practice progressions follow predictable patterns, which turns dictation into deduction. The bass gives the strongest clues.

Bass leaps usually mean root motion. Up a fourth or down a fifth points to dominant-to-tonic motion. The opposite leaps often suggest subdominant-to-tonic. These leaps reveal function even when you can't hear every chord member.

Descending stepwise bass often signals a chain of first-inversion chords or a sequence. A walking bass like C-B-A-G in C major might run I-V6-vi and onward, prized for its smooth voice leading.

Chromatic bass motion signals secondary dominants. A chromatic ascent to a goal note usually means tonicization, like V7/V resolving to V with the bass climbing chromatically into the dominant.

Soprano at cadences is predictable. Authentic cadences usually move 2-1 (re-do) in the soprano; half cadences often end on 2 (re). The soprano rarely leaps at cadences in this style, so those moments are easy points.

Soprano often moves contrary to the bass. If the bass climbs, expect the soprano to fall or stay put. Use the clear voice to predict the unclear one.

Harmonic rhythm tends to speed up toward cadences. A phrase might hold one chord per measure early, then push to two chords per measure heading into the final cadence. Rapid harmonic rhythm (several chords per beat) is rare here.

Solving the Hard Spots

A few problems trip people up, with reliable fixes for each.

Inner voices muddy your perception. You only notate soprano and bass, but alto and tenor still color the sound. Filter for the registral extremes, the highest and lowest pitches. In common-practice writing the inner voices move minimally, so dramatic motion is usually in the outer voices you actually need.

Root position versus first inversion is hard to hear. Listen for whether the bass sounds like the root. If you hear a C major chord but the lowest note feels like E, that's I6 in C major. Inverted chords have a slightly unsettled, floating quality compared to grounded root-position chords.

V versus V7 is tricky because the seventh hides in an inner voice. Listen for tension and resolution instead. V7 pulls harder to I, and its seventh (scale degree 4) resolves down to 3. If you hear that downward resolution in any voice, it confirms V7 even when the seventh itself is hard to isolate.

Common Mistakes

• Leaving a voice blank because the other one is unclear. Soprano, bass, and Roman numerals score independently, so write everything you're confident about. A correct bass alone can earn points and feed your analysis.
• Wrong inversion figures. Roman numerals are all-or-nothing, so ii6 when the answer is ii6/5 earns zero. Pin the inversion from the bass note, then double-check the figure.
• Restarting your analysis every hearing. Abandoning your first impressions usually creates confusion. Your early read on harmonic rhythm and shape is often more accurate than you think, so refine instead of resetting.
• Ignoring voice leading when stuck. Common-practice composers favored smooth motion. If one reading creates awkward leaps or parallel fifths and another flows, the smooth option is usually correct.
• Forgetting the key when notating pitches. A misplaced accidental (F natural in G major) loses the point even if the rhythm and contour are right. Keep the key signature in front of you.
• Chasing exotic chords. The exam tests fundamental harmony, not jazz or chromatic oddities. When unsure, bet on the standard progression.

Practice and Next Steps

Practice harmonic dictation the way it's actually scored: notate outer voices plus Roman numerals from real progressions, starting simple and adding complexity as your ear sharpens. Don't drill chord ID in isolation; work whole progressions under the same time pressure as the exam, since accuracy under the clock is its own skill. Try the FRQ practice with instant scoring and pull more reps from the FRQ question bank.

To strengthen the listening side, run aural guided practice with MCQ questions and review official past exam questions so the dictation format feels routine. Pair this with the melodic dictation guide and the part-writing and harmonization guide to round out the free-response section, then use the AP score calculator to see how your dictation points add up.