AP Music Theory Unit 6 ReviewEmbellishments, Motives, and Melodic Devices

AP Music Theory Unit 6 is about the decorations and the building blocks of melody. You learn how composers spice up a plain chord progression with nonharmonic tones (passing tones, neighbors, suspensions, appoggiaturas, and more) and how they grow whole pieces out of tiny ideas called motives using transformation and sequence. The single biggest idea is that melody and harmony are not separate worlds. Every "extra" note either belongs to the chord or decorates it in a specific, nameable way, and every melody you hear is usually a small idea repeated, varied, and transposed.

What this unit covers

Stepwise embellishing tones: passing and neighbor tones

• A nonharmonic tone (also called a nonchord tone) is any note outside the pitch content of the prevailing chord. You classify each one by how it is approached and how it leaves.
• A passing tone fills the gap between two different chord tones by step, like the D in C-D-E over a C major chord. It is approached by step and left by step in the same direction.
• A neighbor tone steps away from a chord tone and steps right back to it, like C-D-C. An upper neighbor sits above the main note, a lower neighbor sits below it.
• You have to identify these in both notated scores and performed music, so train your ear as well as your eye. Listening for a brief "wrong note" that resolves smoothly by step is the giveaway.
• You also write them. When you compose a bass line under a given soprano in 18th-century chorale style, you can enliven the quarter-note frame with eighth-note unaccented passing or neighbor tones. The good formations are bass eighth notes against a stationary soprano, parallel thirds or sixths with the soprano, and voice exchange.

Leaping and held embellishments: anticipations, escape tones, appoggiaturas, pedal points

• An anticipation arrives early. A note from the next chord shows up before the chord change, then the harmony catches up to it.
• An escape tone steps away from a chord tone, then leaps in the opposite direction to land on the next chord tone. Step in, leap out.
• An appoggiatura is roughly the reverse. It is approached by leap and resolves by step, and it lands in an accented position, which gives it that expressive "lean."
• A pedal point is a sustained note (usually in the bass) that holds steady while the harmonies change above it. The pedal starts as a chord tone, becomes nonharmonic as chords shift, and usually ends as a chord tone again.

Suspensions and retardations

• A suspension has three stages. The preparation is a chord tone, the suspension holds that note over while the chord changes (making it nonharmonic), and the resolution steps down to a chord tone.
• Suspensions come in flavors named by the intervals above the bass, like the 4-3 suspension. In figured bass and Roman numeral progressions, Arabic numerals like 4-3 tell you exactly which suspension to write.
• A rearticulated suspension restrikes the suspended note instead of tying it over. A chain of suspensions links several suspensions in a row, with each resolution preparing the next one.
• A retardation works like a suspension but resolves up by step instead of down. The exam boundary is specific here. You need to identify and notate suspensions, but you only need to identify retardations.

Motives and motivic transformation

• A motive is a short melodic and/or rhythmic idea, the smallest building block of a phrase. Think of the four-note opening of Beethoven's Fifth as the classic example of how far a tiny idea can go.
• Composers develop motives through procedures collectively called motivic (or thematic) transformation. Literal repetition states the motive again unchanged. Sequential repetition restates it at a new pitch level. Fragmentation breaks off a piece of the motive and works with just that fragment.
• Some transformations are purely rhythmic. Augmentation stretches the rhythmic values longer, diminution compresses them shorter.
• Some are purely about pitch. Melodic inversion flips the contour, so every upward interval becomes a downward one and vice versa.
• Retrograde transforms both pitch and rhythm by stating the motive backwards.

Melodic and harmonic sequence

• A melodic sequence is a melodic segment followed immediately by one or more transpositions of itself. The interval of transposition stays constant, so a sequence up a third keeps moving up by thirds each time.
• A harmonic sequence is the same idea applied to chords. A segment of chords is immediately transposed, again at a consistent interval.
• The two often travel together. A melodic sequence may ride on top of a corresponding harmonic sequence, and recognizing one helps you find the other.

Unit 6, Embellishments, Motives, and Melodic Devices at a glance

Why Unit 6, Embellishments, Motives, and Melodic Devices matters in AP Music

Units 4 and 5 gave you the harmonic skeleton. Unit 6 is where music starts sounding like music, because real pieces are full of notes that do not belong to the chord of the moment. Until you can label those notes, harmonic analysis is guesswork. Once you can, you can strip any melody down to its chordal frame and see the progression clearly.

• Nonharmonic tones are the difference between analyzing a textbook chorale and analyzing actual repertoire, where almost every measure has decorative notes you must filter out to find the harmony.
• Writing unaccented passing and neighbor tones in a bass line is a core part-writing skill, and it directly upgrades your figured bass and composition work.
• Motives and sequences are the engine of musical form. Recognizing how a small idea gets repeated, fragmented, and transposed is how you explain why a piece holds together.

How this unit connects across the course

• Everything here decorates the harmonic framework you built in Units 4 and 5. You cannot label a nonharmonic tone until you know what the harmonic tones are, so chord function, cadences, and predominant progressions (Units 4 and 5) are prerequisites you keep using on every example.
• Interval and contour skills from melody work (Unit 2) come back hard in motivic transformation. Inversion and sequence are all about tracking interval size and direction precisely.
• Secondary function (Unit 7) gets easier when you can hear sequences, because harmonic sequences often carry chromatic, sequential progressions. Knowing the sequence pattern tells you where the chromatic chords are headed.
• Motives are the smallest units of form, and Unit 8 zooms out to full phrases and formal structures. Fragmentation, repetition, and sequence are exactly the tools you will trace when you analyze how phrases and sections are built.

Key notation and chord types

• Figured bass Arabic numerals (4-3): indicate a specific suspension above the bass; you must realize these accurately when writing from figured bass.
• Roman numeral progressions with embellishments: the Roman numeral names the chord, and any added numerals or context tell you which nonharmonic tones to notate within it.
• Eighth-note motion in chorale bass lines: the standard way to add unaccented passing and neighbor tones to a quarter-note frame, ideally forming parallel thirds or sixths with the soprano or a voice exchange.
• Tie or held notation for suspensions: a suspension is typically tied over the chord change; a rearticulated suspension restrikes the note instead.
• Chain of suspensions: consecutive suspensions notated so each resolution becomes the preparation for the next.
• Pedal point notation: a long sustained bass note (often tonic or dominant) held through changing harmonies above it.

Unit 6, Embellishments, Motives, and Melodic Devices on the AP exam

This unit shows up in both your eyes and your ears. Multiple-choice questions based on notated scores ask you to label specific nonharmonic tones, identify motivic transformations (is this fragment an inversion, augmentation, or sequential repetition?), and recognize melodic and harmonic sequences within an excerpt. Aural multiple-choice questions play an excerpt and ask you to identify embellishing tones or melodic procedures by ear, so practice hearing the difference between a passing tone's smooth motion and an appoggiatura's accented leap-and-resolve.

In the free-response section, this content lives inside the part-writing tasks. Figured bass realization can include suspension figures like 4-3 that you must notate correctly with proper preparation and resolution. The composition of a bass line under a given soprano rewards well-placed unaccented passing and neighbor tones that follow 18th-century voice-leading norms. Remember the boundary that matters here. You must identify and notate suspensions, but retardations only need identification. On sight-singing and dictation tasks, recognizing a sequence is a practical shortcut, because once you catch the pattern you can predict the next transposition instead of decoding every note from scratch.

Essential questions

• How do composers add expressiveness to a harmonic framework without breaking the rules of voice leading?
• What makes a note "nonharmonic," and why does classifying its approach and resolution matter for analysis?
• How can a motive of just a few notes generate an entire melody, phrase, or piece?
• What is the relationship between melodic sequence and harmonic sequence, and how does each create musical expansion?

Key terms to know

• Nonharmonic tone: a note outside the pitch content of the prevailing chord, classified by how it is approached and resolved.
• Passing tone: a nonharmonic tone that connects two chord tones by stepwise motion in one direction.
• Neighbor tone: a nonharmonic tone that steps away from a chord tone and returns to it; can be upper or lower.
• Anticipation: a note belonging to the next chord that arrives before the chord change.
• Escape tone: a nonharmonic tone approached by step and left by leap in the opposite direction.
• Appoggiatura: an accented nonharmonic tone approached by leap and resolved by step.
• Suspension: an accented nonharmonic tone held over from the previous chord that resolves down by step, with preparation, suspension, and resolution stages.
• Retardation: a held-over nonharmonic tone that resolves up by step instead of down.
• Pedal point: a sustained note, usually in the bass, held while harmonies change above it.
• Motive: a short melodic and/or rhythmic idea that serves as the basic building block of a phrase.
• Fragmentation: developing a motive by using only a portion of it.
• Augmentation: a rhythmic transformation that lengthens a pattern's note values; diminution shortens them.
• Melodic inversion: a pitch transformation that flips a motive's contour so each interval reverses direction.
• Sequence: immediate repetition of a melodic segment or chord segment at a new pitch level, with a constant interval of transposition.

Common mix-ups

• Appoggiatura vs. escape tone: they are mirror images. An appoggiatura leaps in and steps out (accented). An escape tone steps in and leaps out (unaccented). Check the approach first.
• Suspension vs. retardation: both are held over from the previous chord, but a suspension resolves down by step and a retardation resolves up. Also remember you only notate suspensions on the exam; retardations are identify-only.
• Sequence vs. repetition: literal repetition restates a motive at the same pitch level. A sequence immediately restates it at a different pitch level, and the transposition interval stays consistent.
• Retrograde vs. inversion: inversion flips the contour up-and-down (pitch only), while retrograde plays the motive backwards, transforming both pitch order and rhythm.