AP Music Theory Quick Review

Every pitch has a fixed letter name (A--G) and octave register, and a clef simply tells you which lines/spaces map to which pitches.

Treble (G) clef curls around the G4 line; bass (F) clef's dots surround the F3 line. Middle C (C4) sits on the ledger line between the two staves. Alto clef centers middle C on the middle line; tenor clef places middle C on the second-from-top line --- both are C clefs used for viola and cello/bassoon/trombone respectively. Octave designation uses scientific pitch notation (C4 = middle C).

Alto clef vs.\ tenor clef: both are "C clefs," but the notch/center of the symbol marks middle C on a different line in each --- alto = middle line, tenor = fourth line.

On nonaural score-reading MC items, students misread alto/tenor clef by treating it like treble or bass clef out of habit, shifting every pitch by a third or more.

Clef center $arrow$ points at middle C.

An interval's number (size) comes from counting letter names inclusive; its quality (Perfect/Major/minor/Augmented/diminished) comes from counting half steps.

Perfect intervals: unison, 4th, 5th, octave. Major/minor pairs: 2nd, 3rd, 6th, 7th. To invert an interval: new number $= 9 - old number$; quality inverts as $M ≤ftrightarrow m$, $A ≤ftrightarrow d$, $P ≤ftrightarrow P$. Example: a major 3rd inverts to a minor 6th.

Augmented 4th vs.\ diminished 5th: both equal 6 half steps (the tritone) and are enharmonically identical, but spelling depends on the letter-name distance (4th vs.\ 5th).

Students count half steps correctly but forget to count the letter-name span first, mislabeling a correctly-sized interval with the wrong quality (e.g., calling a diminished 3rd a major 2nd because both are 2 half steps).

Count letters for size $arrow$ count half steps for quality.

Every major scale follows the identical whole/half-step pattern, and its key signature is fully predictable from the circle of fifths.

Major scale pattern: W--W--H--W--W--W--H. Order of sharps: F--C--G--D--A--E--B; order of flats is the reverse: B--E--A--D--G--C--F. Circle of fifths moves clockwise by ascending perfect 5ths adding sharps (C--G--D--A--E--B--F$$--C$$) and counterclockwise by descending 5ths adding flats (C--F--B$$--E$$--A$$--D$$--G$$).

Key signature order vs.\ scale-degree order: the sharps/flats are always written and added in the fixed circle-of-fifths order regardless of which key you're in --- you never reorder them.

Students correctly identify the number of sharps/flats from a signature but misidentify the major key by forgetting the "last sharp + 1 half step = tonic" or "second-to-last flat = tonic" shortcuts, especially in $F$ major (one flat, tonic is not derived from the "last flat" rule).

Last sharp $+ /12$ step $=$ major key; 2nd-to-last flat $=$ major key.

Meter tells you how beats group (duple/triple/quadruple) and how each beat subdivides (simple = in 2s, compound = in 3s).

Time signature top number: simple meters use 2, 3, or 4 (beat divides in two); compound meters use 6, 9, or 12 (beat divides in three, beat = dotted note). Bottom number/denominator shows the note value receiving one division-unit. $6/8$ = compound duple (2 beats, each a dotted quarter).

Compound duple ($6/8$, 2 beats/measure) vs.\ simple triple ($3/4$, 3 beats/measure): both have 6 eighth notes per measure but group and accent them completely differently.

On dictation and MC rhythm items, students miscount $6/8$ as having six beats instead of two large beats, garbling the notated rhythm's accent pattern.

Top number 6, 9, 12 $arrow$ think compound, beat divides in 3.

Italian (and some non-Italian) terms and symbols precisely encode speed, volume, articulation, and mood, and the exam tests recognition of these terms on the printed score.

Tempo (slow$→$fast): Largo, Adagio, Andante, Moderato, Allegro, Presto. Dynamics (soft$→$loud): $pp, p, mp, mf, f, ff$; crescendo/decrescendo (hairpins) show gradual change. Articulation marks: staccato (dot, detached), legato (slur, connected), accent ($>$), tenuto (dash, held full value).

Ritardando (gradually slowing) vs.\ a tempo (return to original speed) vs.\ rubato (flexible, expressive timing without a fixed new tempo).

Nonaural MC items ask students to match a term to its correct effect on the score --- a common trap swaps "accelerando" (speed up) with "crescendo" (get louder) since both connote intensification.

Speed = Italian tempo words; loudness = dynamic letters; both change gradually with -ando/hairpins.

Minor has three related scale forms because the raw (natural) minor scale lacks a strong leading tone, so composers alter scale degrees $6$ and/or $7$ to create pull toward the tonic.

Natural minor: W--H--W--W--H--W--W (no alterations). Harmonic minor: raises $7$ only, creating an augmented 2nd between $6$ and $7$. Melodic minor: raises both $6$ and $7$ ascending, but reverts to natural minor descending.

Harmonic minor vs.\ melodic minor ascending: harmonic minor raises only $7$ (leaving the awkward augmented 2nd); melodic minor smooths that gap by also raising $6$.

On dictation, students hear a raised $ 7$ and automatically notate harmonic minor even when $ 6$ was also raised (melodic minor) or when the passage descends (should revert to natural minor).

Harmonic raises $7$ only; melodic raises $6$ & $7$ up, natural minor down.

Relative keys share a key signature but have different tonics; parallel keys share a tonic but have different key signatures.

Relative minor tonic $=$ major tonic's $ 6$ (a minor 3rd below, or major 6th above). Example: C major and A minor share zero sharps/flats. Parallel minor of C major is C minor (same tonic, 3 flats).

"Relative" (same signature, different tonic) vs.\ "parallel" (same tonic, different signature) is one of the single most commonly reversed vocabulary pairs on the exam.

Given a key signature and asked for "the relative minor," students instead supply the parallel minor (same letter name, wrong signature), or vice versa.

Relative = same signature; parallel = same letter name.

Melodies are built from small recurring ideas (motives) that combine into phrases, and their shape (contour) and function are testable, describable features.

Motive: the smallest recognizable melodic/rhythmic idea. Sequence: a motive restated immediately at a new pitch level. Contour types: ascending, descending, arch, inverted arch, static. A phrase is a complete musical thought typically ending in a cadence.

Sequence (exact pattern repeated at a new pitch level) vs.\ simple repetition (restated at the same pitch level) --- only transposed restatement counts as sequence.

On aural MC items, students label a repeated motive at the same pitch as a "sequence" simply because it repeats, ignoring that true sequence requires transposition.

Sequence $=$ same shape, new pitch level.

Texture describes how many independent melodic layers are sounding and how they relate; timbre describes tone color/instrumentation.

Monophonic: single unaccompanied melodic line. Homophonic: one melody with subordinate accompaniment (chordal support). Polyphonic (contrapuntal): two or more independent, equally important melodic lines simultaneously.

Homophonic vs.\ polyphonic: homophony has one clearly dominant line over accompaniment; polyphony has multiple independent lines of comparable melodic interest (e.g., a fugue or round).

Students hear multiple voices singing different rhythms and assume polyphony, even when one voice is clearly the melody and the others are static chordal support (which is still homophonic).

One tune + backup $=$ homophonic; several independent tunes at once $=$ polyphonic.

A triad's quality is entirely determined by stacking two thirds and reading their qualities from the bottom up.

Major $=$ M3 + m3. Minor $=$ m3 + M3. Diminished $=$ m3 + m3. Augmented $=$ M3 + M3. Root position: root in bass. First inversion: 3rd in bass. Second inversion: 5th in bass.

"Root position" (a specific position with root in the bass) vs.\ "root" (the note the chord is built on, present in every inversion) --- the root doesn't move, only which chord member is in the bass changes.

Given a triad spelled out of root-position order (e.g., $E$--$G$--$C$), students misidentify the root as the lowest sounding note instead of stacking the notes in thirds first to find the true root ($C$).

Stack in 3rds from the root to find quality; lowest sounding note tells inversion.

Seventh chords add a fourth note a third above the triad, and the combination of triad quality + 7th quality creates five distinct seventh-chord types.

Major 7th $=$ major triad + major 7th (e.g., $Cmaj7$). Dominant 7th $=$ major triad + minor 7th (e.g., $V^7$). Minor 7th $=$ minor triad + minor 7th. Half-diminished 7th $=$ diminished triad + minor 7th ($ 7$). Fully diminished 7th $=$ diminished triad + diminished 7th ($^7$).

Half-diminished 7th ($$, diminished triad + minor 7th, as in vii$^7$ in major) vs.\ fully diminished 7th ($^7$, diminished triad + diminished 7th, as in vii$^7$ in minor) --- one half step in the 7th changes the whole chord's function and resolution.

Students correctly spell the four notes of a diminished seventh chord but forget that the top interval must also be diminished (not minor), miscounting the chord as half-diminished.

Triad quality + 7th quality = one of five 7th-chord types; check both halves.

Figured bass numerals describe the intervals above the bass note, letting a performer (or you) reconstruct full chord spelling and inversion from a single bass line.

Triads: root position $= /53$ (usually unmarked); first inversion $= 6$ (short for $/63$); second inversion $= /64$. Seventh chords: root position $= 7$; first inversion $= /65$; second inversion $= /43$; third inversion $= /42$ (or just 2).

Figured bass numerals (intervals above the given bass note) vs.\ Roman numerals (scale-degree root + quality) --- figures alone never tell you the key or root; they must be paired with a Roman numeral for full harmonic meaning.

Students see "6" and assume it means "add a 6th scale degree" rather than correctly reading it as "first-inversion triad: 6th and 3rd above the bass."

Figures = intervals above the bass; $6 →$ 1st inv.\ triad, $/64 →$ 2nd inv.\ triad, $/65 →$ 1st inv.\ 7th chord.

Roman numerals label a chord's scale-degree root and quality simultaneously, using case and symbols as shorthand.

Case shows quality: uppercase $=$ major, lowercase $=$ minor, lowercase $+ ^ =$ diminished, uppercase $+ + =$ augmented. Diatonic triads in major: I ii iii IV V vi vii$^$. Diatonic triads in harmonic minor: i ii$^$ III$^+$ iv V VI vii$^$.

iii (diatonic minor triad on $ 3$ in major) vs.\ III$^+$ (the augmented triad on $ 3$ that appears in harmonic minor because of the raised leading tone) --- same scale degree, very different quality depending on mode.

Students build minor-key triads using the natural minor scale by default, missing that standard Roman numeral analysis in minor assumes the raised leading tone (harmonic minor) for V and vii$^$.

Major: I ii iii IV V vi vii$^$. Minor (harmonic): i ii$^$ III$^+$ iv V VI vii$^$.

Every diatonic chord serves one of three functional roles that describe its "job" in a progression: establishing rest (tonic), building tension toward the dominant (predominant), or creating tension that demands resolution (dominant).

Tonic function: I, vi (and iii, weakly). Predominant function: ii, IV (and vi). Dominant function: V, vii$^$. Normative harmonic motion flows T $→$ PD $→$ D $→$ T.

vi as tonic substitute (T function, can follow V in a deceptive motion or stand in for I) vs.\ vi as predominant (leading into ii or IV) --- vi's function depends on context, unlike most other chords.

Students assume every progression must literally contain I--IV--V--I and flag functionally normal but less common orderings (like a predominant vi moving to ii) as "wrong," when functional category order is what actually matters.

T $→$ PD $→$ D $→$ T is the functional skeleton of tonal harmony.

A cadence is a harmonic punctuation mark, and its exact type is defined by strict, checkable criteria about which chords are used and how the soprano/bass are voiced.

Perfect Authentic Cadence (PAC): V(or V$^7$)--I, both root position, soprano ends on $ 1$. Imperfect Authentic Cadence (IAC): same chords but one PAC condition fails (e.g., soprano ends on $ 3$, or a chord is inverted). Half Cadence (HC): ends on V. Deceptive Cadence (DC): V--vi. Plagal Cadence (PC): IV--I ("Amen" cadence).

Half Cadence (ends on V, sounds unfinished) vs.\ Deceptive Cadence (moves through V but resolves to vi instead of I, subverting an expected PAC) --- both involve V, but HC stops there while DC moves past it unexpectedly.

Students see a V chord at a phrase end and immediately call it a half cadence without checking whether the next phrase begins on vi (deceptive) or whether the phrase before ended on V--I (making the V--vi the actual deceptive event).

PAC $=$ V--I, root position, soprano on $1$; anything less $=$ IAC; ends on V $=$ HC; V--vi $=$ deceptive.

Phrases combine into larger units using two dominant formal templates: the period (two balanced phrases) and the sentence (statement + development).

Period: antecedent phrase (weaker cadence, often HC) $+$ consequent phrase (stronger cadence, often PAC); "parallel period" if both phrases start alike, "contrasting period" if not. Sentence: presentation phrase (basic idea $+$ repetition) $+$ continuation phrase (fragmentation, faster harmonic rhythm, cadence).

Parallel period (two phrases that begin the same way but end with different cadence strength) vs.\ repeated phrase (identical phrase heard twice) --- a parallel period requires two different cadences, not an exact repeat.

Students label any two-phrase unit ending in a PAC as a "period" without checking that the first phrase actually ends with a weaker cadence (HC or IAC) than the second.

Period $=$ weak cadence then strong cadence, balanced; sentence $=$ idea, idea again, then fragmented continuation.

Four-part chorale writing follows a fixed set of spacing, doubling, and motion rules that keep individual lines smooth and independent-sounding.

Spacing: adjacent upper voices (S--A, A--T) within an octave; bass can range more widely. Doubling: normally double the root in root position; never double the leading tone or a chordal 7th. Forbidden motion: parallel/consecutive perfect 5ths and octaves between any voice pair; avoid voice crossing and overlap.

Parallel motion (both voices move the same direction by the same generic interval) vs.\ similar motion (same direction, different interval) --- only parallel motion into/through perfect 5ths or octaves is strictly forbidden; similar motion into a perfect interval (direct/hidden 5th or octave) is only a problem in the outer voices when the soprano leaps.

Students check for parallel 5ths/octaves only between soprano and bass and miss a pair of parallel fifths hiding between an inner voice (alto or tenor) and another voice.

Check every voice pair for parallel 5ths/8ves, not just the outer voices.

ii and IV are the workhorse predominant chords, and root-position part-writing between them and the tonic/dominant follows predictable common-tone and stepwise-motion strategies.

Root-position triads a 4th/5th apart (e.g., I--IV, IV--V): keep the common tone, move the other voices to the nearest chord tone, all voices generally moving in similar/contrary but not parallel motion; root-position triads a 3rd apart (e.g., I--vi): keep two common tones, move the third voice by step.

Root-position motion by a 4th/5th (one common tone, other voices leap to nearest chord tone or move by step) vs.\ motion by a 3rd (two common tones held, one voice moves by step) --- using the wrong strategy is the single fastest way to create parallel 5ths/8ves.

Students apply the "keep common tone(s), move by step" method inconsistently, especially forgetting that root motion by 4th/5th normally requires contrary or oblique motion in the outer voices to avoid parallels.

Roots a 5th apart $→$ 1 common tone; roots a 3rd apart $→$ 2 common tones.

First-inversion triads smooth out the bass line (stepwise motion instead of leaps) and loosen the strict doubling/motion rules that apply to root position.

First-inversion chords typically double the soprano note or another chord member (never the leading tone); vii$^$ and ii$^$ (in minor) almost always appear in first inversion to avoid an awkward root-position diminished-triad bass.

vii$^ 6$ (first inversion, common substitute for V, bass on $ 2$) vs.\ vii$^$ in root position (rare in tonal part-writing because the diminished 5th lands on the bass, sounding unstable) --- default to first inversion for diminished triads unless told otherwise.

Students freely double the bass note in a first-inversion triad exactly as they would in root position, accidentally doubling the leading tone when the bass of vii$^ 6$ is $ 2$, not realizing the 3rd of that chord (the leading tone) is now on top.

First inversion loosens the rules but never lets you double the leading tone.

Second-inversion (six-four) triads are dissonant embellishments of a different chord, not independent harmonies, and each type is named for how it's approached and left.

Cadential $/64$: I$^6_4$--V(--I), metrically accented, the 6th and 4th resolve down by step to the 5th and 3rd of V; functions as a decorated V, so it is labeled V$^6-5_4-3$ by some texts. Passing $/64$: connects two positions of the same chord stepwise in the bass. Pedal (neighboring) $/64$: bass stays static while upper voices move by step and back.

Cadential $/64$ (functions as dominant preparation, appears on a strong beat right before V) vs.\ passing/pedal $/64$ (functions as an embellishment of tonic or another chord, appears on a weak beat) --- the cadential $/64$ is really heard as V, not I, despite the I-chord spelling.

Students label every $/64$ chord "I$/64$" and analyze it as prolonged tonic, missing that the cadential $/64$'s harmonic function is dominant, which changes the Roman-numeral/figured-bass label expected on the FRQ.

Six-four chords are always dissonant embellishments --- name them by how they move, not by their spelling alone.

Adding a 7th to the dominant triad (or building a 7th chord on the leading tone) intensifies the pull toward tonic through the added dissonant interval that must resolve by step.

V$^7$: major triad + minor 7th; the chordal 7th ($ 4$) resolves down by step, the leading tone ($ 7$) resolves up to $ 1$. In V$^7$, the 5th may be omitted and the root tripled to allow complete resolution. vii$^7$ (minor) / vii$^7$ (major) substitute for V$^7$ with similar resolution tendencies.

V$^7$ (dominant 7th, major triad + minor 7th, used in both major and minor) vs.\ vii$^7$ (fully diminished 7th, built on the raised leading tone, functions almost identically to V$^7$ but with no perfect 5th above the root).

Students resolve V$^7$ by moving the chordal 7th up instead of down, or resolve the leading tone down instead of up, breaking the two defining tendency-tone resolutions the FRQ rubric checks first.

V$^7$: $4$ (the 7th) falls, $7$ (the leading tone) rises --- always.

The most common nonharmonic tones simply decorate a line stepwise around notes that already belong to the underlying chord.

Passing tone (PT): approached and left by step in the same direction, filling in a third between two chord tones. Neighbor tone (NT): approached by step, left by step in the opposite direction, returning to the same chord tone (upper or lower neighbor). Both are typically unaccented (weak beat/weak part of beat).

Passing tone (steps continue in one direction, connecting two different chord tones) vs.\ neighbor tone (steps reverse direction, returning to the same chord tone) --- direction of the second step is the deciding factor.

On dictation and analysis FRQs, students label every stepwise non-chord note as a "passing tone" by default without checking whether the line actually returns to its starting pitch (which would make it a neighbor tone instead).

Same direction twice $=$ passing; there-and-back $=$ neighbor.

Accented nonharmonic tones create dissonance on the beat, which is what makes them expressive, and each type is defined by how it is prepared, struck, and resolved.

Suspension: prepared (same pitch as a consonant chord tone in the previous chord), sounded as a dissonance on the beat, resolved down by step; labeled by interval pairs (4--3, 7--6, 9--8, 2--3 in the bass). Appoggiatura: unprepared, approached by leap, accented, resolved by step (usually down). Escape tone (échappée): approached by step, left by leap, unaccented. Anticipation: sounds the next chord tone early, before its chord arrives. Pedal point: a sustained/repeated bass note (usually $1$ or $5$) that stays fixed while the harmony above it changes.

Suspension (must be prepared as a consonance in the prior chord before becoming dissonant) vs.\ appoggiatura (unprepared, arrives by leap directly into the accented dissonance) --- preparation is the deciding test.

Students correctly spot an accented dissonance resolved by step but skip checking whether the same pitch was held over from the previous chord, mislabeling an unprepared appoggiatura as a suspension (or vice versa).

Suspension $=$ tied over, then falls; appoggiatura $=$ leaps in, then falls; no tie $→$ no suspension.

Composers extend and vary short ideas through a small toolkit of transformation techniques that the exam expects you to name precisely.

Sequence: motive repeated at a new pitch level (real sequence = exact interval pattern; tonal sequence = adjusted to stay diatonic). Inversion: melodic contour flipped upside down. Augmentation/diminution: rhythmic values proportionally lengthened/shortened. Imitation: a motive restated in a different voice, often overlapping with the original.

Sequence (restatement at a new pitch level within the same voice) vs.\ imitation (restatement in a different voice, often at the same or related pitch level, common in polyphonic texture) --- one moves in pitch, the other moves between parts.

Students hear a motive return in another voice and call it a sequence because "it repeated," missing that true sequence requires the same voice restating the idea at a transposed pitch level.

Sequence $=$ same voice, new pitch; imitation $=$ new voice, echoed idea.

Any major or minor diatonic triad can be temporarily "tonicized" by borrowing its own dominant chord from its own key, written as a slash chord relative to that target.

Secondary dominant notation: V/x or V$^7$/x, read "V of x," where x is the tonicized (target) chord. Only major or minor triads can be tonicized (never diminished or augmented triads --- there is no V/vii$^$ or V/iii$^+$ in minor). Spelling: build a major triad (or Mm7 chord) a 5th above the target's root, borrowing whatever accidental is needed.

V/V (secondary dominant of the dominant, e.g., in C major this is a D-major triad, notes $D$--$F$--$A$) vs.\ V$^7$ of the home key (the actual dominant seventh of the piece's overall tonic) --- V/V resolves to V, not to I.

Students spell a secondary dominant using the home key's signature instead of borrowing the necessary chromatic accidental (e.g., forgetting the $F$ needed to make V/V a major triad in C major), producing a diatonic triad instead of a true secondary dominant.

V/x $=$ build a major (or Mm7) chord a 5th above x's root; it resolves to x.

Just like V, the leading-tone triad/seventh chord of any tonicized key can also be borrowed to intensify motion toward that same target chord.

Notation: vii$^$/x or vii$^7$/x (or vii$^7$/x), a diminished (or half-/fully-diminished seventh) chord built a half step below the target's root. Resolves the same way a normal leading-tone chord resolves: leading tone up by step, chordal 7th (if present) down by step, into the tonicized chord.

vii$^7$/x (secondary leading-tone seventh, fully diminished, common when tonicizing a minor-mode target) vs.\ vii$^7$/x (secondary leading-tone seventh, half-diminished, common when tonicizing a major-mode target) --- the target chord's quality determines which 7th-chord type is idiomatic.

Students build the secondary leading-tone chord a half step below the tonic of the piece instead of a half step below the target chord's root, misplacing the entire chord.

vii$^$/x sits a half step below x's root and always resolves up into x.

Tonicization is a brief, local emphasis of a chord using its own secondary dominant/leading-tone chord, while modulation is a genuine, confirmed change of key, usually sealed with a cadence in the new key.

Common-chord (pivot-chord) modulation: a chord diatonic to both the old and new key is relabeled with Roman numerals in both keys, then the music confirms the new key with a cadence. Closely related keys (reachable by pivot chord) share nearly all the same pitches: the dominant, the subdominant, and the relative major/minor.

Tonicization (brief, no lasting key change, often signaled by just one secondary chord resolving back to the original tonic quickly) vs.\ modulation (the new key is established and confirmed with its own cadence, and the music stays there).

Students see a single secondary dominant chord and immediately declare "modulation to a new key," when the passage returns to the original tonic within a measure or two (correctly just a tonicization).

One secondary chord that snaps back $=$ tonicization; a cadence that sticks $=$ modulation.

The seven diatonic modes are all built from the same collection of white-key half/whole-step relationships, just starting on a different scale degree, and each has one "characteristic" scale degree that distinguishes it from major or minor.

Ionian $=$ major (start on $1$). Dorian $=$ natural minor with a raised $6$ (start on $2$). Phrygian $=$ natural minor with a lowered $2$ (start on $3$). Lydian $=$ major with a raised $4$ (start on $4$). Mixolydian $=$ major with a lowered $7$ (start on $5$). Aeolian $=$ natural minor (start on $6$). Locrian $=$ diminished 5th above the tonic (start on $7$, rarely tested).

Dorian (minor-sounding, but with a raised $6$, giving it a brighter sixth degree than natural minor) vs.\ Aeolian (plain natural minor, unaltered $6$ and $7$) --- play or sing $6$ to tell them apart quickly.

Given a mode built on a non-C starting pitch, students identify the mode name correctly but forget to check the key signature/accidentals actually used, confusing (for example) D Dorian with D minor because both "start on D."

Each mode $=$ major scale relettered starting on scale degree $1$ through $7$; check the one altered "characteristic" degree.

Binary and ternary form are defined by how many contrasting sections there are and whether the opening material returns.

Binary (AB): two sections, usually both repeated; simple binary has no return of the A material in B; ternary (ABA): a full, clearly restated A section returns after a contrasting B section.

Simple binary (AB, no return of A's opening material within B) vs.\ rounded binary (AB, but the end of B brings back the opening idea of A, making it feel like ABA even though it is still notated/repeated as two large sections) --- rounded binary is a subtype of binary, not ternary.

Students hear the opening melody return near the end of the second section and immediately call the form "ternary," without checking whether the return is a full restatement of an entire independent A section (ternary) or just the closing gesture of a still-binary structure (rounded binary).

AB, no return $=$ simple binary; ABA, full restatement $=$ ternary; AB with a partial return at the end of B $=$ rounded binary.

Rounded binary and theme-and-variations both organize a piece around a single core idea, but they treat repetition and change very differently.

Rounded binary: $$: A :$$: B A$'$ :$$ --- the A material returns (often varied/abbreviated) at the end of the second reprise. Theme and variations: a clear theme is stated, then restated multiple times with each variation changing melody, harmony, rhythm, or texture while preserving an underlying structural skeleton (often the harmonic/phrase plan).

Rounded binary's "A$'$" (a partial, integrated return within one continuous second section) vs.\ a full "variation" in theme-and-variations form (an entire self-contained restatement of the whole theme with its own new treatment) --- scale and independence of the return is the key difference.

On formal-analysis FRQ-style reasoning, students label a piece "theme and variations" just because a melody keeps coming back, without confirming that each return is a complete, independently varied statement of the whole theme rather than a partial reprise within a binary structure.

Rounded binary $=$ partial return inside one section; theme and variations $=$ full theme restated and transformed, again and again.

Formal analysis works from the bottom up: find the smallest units (motives, phrases) first, then group them into larger sections defined by cadences and thematic return.

Analysis order: (1) locate all cadences and mark phrase boundaries; (2) label each phrase's melodic material with letters (a, a$'$, b, ...); (3) group phrases into larger sections using double bars/repeat signs and key changes; (4) name the overall form (period, sentence, binary, ternary, etc.) only after the smaller units are mapped.

Formal section labels (A, B, A$'$) vs.\ phrase-level melodic labels (a, a$'$, b) --- capital letters mark large formal sections; lowercase letters mark the smaller phrase-level material inside them, and mixing up the two scales of analysis muddles the final answer.

Students jump straight to naming the overall form before locating the cadences, guessing "ternary" or "binary" from the melody's general feel rather than from the actual harmonic/cadential evidence in the score.

Cadences first, then phrase letters, then section letters, then name the form last.

A compressed formula sheet for the symbols you must decode instantly on both the aural and nonaural sections.

When in doubt: stack in thirds, count half steps, read the figure as "interval above the bass."

These vocabulary pairs are the single highest-yield fixes for careless points lost on MC and FRQ labeling.

Every one of these pairs shares surface features but differs on one precise, checkable criterion.

A flat "what does what" reference for the two families of labeling tasks that appear on nearly every FRQ.

Cadences classify endings; nonchord tones classify decorations --- know the checklist for each.

The handful of memorized reference lists that unlock nearly every fundamentals and part-writing question.

Sharps: Fat Cats Go Down Alleys Eating Birds; flats: Battle Ends And Down Goes Charles' Father.

A repeatable step-by-step routine for the figured-bass and Roman-numeral part-writing free-response questions.

Roman numerals $→$ cadence $→$ bass $→$ soprano $→$ inner voices $→$ check every pair for parallels.

Knowing the exact shape of the exam lets you pace and prioritize correctly on test day.

75 MC (45%) $+$ 7 written FRQs (45%) $+$ 2 sung melodies (10%) $=$ the whole exam.

Dictation rewards a consistent listening routine over trying to write down every note on the first hearing.

Contour and key first, exact pitches last --- never try to notate on the very first listen.

The second highest-yield skill after part-writing is quickly and accurately labeling harmony you see or hear, including catching intentional errors.

Key first, then bass scale degree, then stack in thirds, then case + figure together.

Short "sounds true but isn't" corrections that catch the most common wrong answers on the real exam.

If a rule "sounds obvious," check it against the exact criteria above before trusting it.

The most-tested facts from every unit, condensed to one line each for a last scan before you walk in.

Function, cadence, voice-leading, dictation strategy, exam weights --- that's the whole course in one pass.