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🎶AP Music Theory Unit 2 Review

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2.12 Texture Devices

🎶AP Music Theory
Unit 2 Review

2.12 Texture Devices

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025
🎶AP Music Theory
Unit & Topic Study Guides
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How do we actually create musical textures? There are several strategies that composers like to use. 

Texture in the Bass Line

The first textural device we can use appears in the bass line. There are two common bass lines: Alberti bass and walking bass. 

Alberti bass consists of a repeating arpeggio pattern that moves in a continuous, rolling motion. It is typically played on a keyboard instrument, such as a piano or harpsichord, and is used to provide a sustained and harmonically rich accompaniment to a melody. The pattern is usually played in the left hand while the right hand plays the melody.

The standard Alberti bass pattern consists of a broken chord in which the notes are played in a descending order, starting with the root of the chord, then the fifth, then the third, and finally the root again. The pattern then repeats, starting on the next chord in the progression. This creates a smooth, flowing accompaniment that can provide a sense of forward momentum and momentum to a piece of music.

Here’s  what an Alberti bass might look like 

Alberti bass is usually used in piano or keyboard music, and it was used very often in the classical era: Mozart, Beethoven, and Haydn used Alberti bass often. A very famous piece that uses Alberti bass is Mozart’s Sonata No 16 in C Major. Can you hear the Alberti bass? 

Walking bass is a type of bass line that is commonly used in jazz, blues, and other forms of popular music. It is characterized by a continuous, forward-moving motion that creates a sense of momentum and drives the rhythm of the piece.

In a walking bass line, the bass player typically plays a series of quarter notes or eighth notes that move in a stepwise motion, either ascending or descending. The notes of the bass line are typically played on the beat and outline the chord progression of the piece. Walking bass lines are often played on a bass guitar or a double bass, and they can be played with a variety of techniques, including plucking, slapping, and bowing.

Here’s an example of a walking bass line:

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Polyphonic Textural Device

Polyphony is a type of musical texture in which two or more independent melodic lines are combined to create a complex, harmonically rich sound. Polyphonic music is characterized by the interweaving of multiple melodic lines, each of which has its own rhythm, melody, and harmonic structure.

Polyphonic music can be created through a variety of techniques, including various contrapuntal techniques, in which multiple voices move against or with each other in a harmonically interdependent way. It can also be created through the use of harmony, in which multiple voices play different pitches at the same time to create chords.

There are two special forms of counterpoint that create unique textures: canonical musicimitation counterpoint, and countermelodies

A canon is a type of musical composition in which a melody is imitated by one or more voices in a staggered or overlapping fashion. Canons are often characterized by their strict, formal structure and their use of repetition and imitation as compositional devices.

There are many different types of canons, and they can vary in terms of their length, number of voices, and degree of complexity. Some common types of canons include:

  • Round: A round is a type of canon in which a melody is repeated by different voices at different times, creating a harmonically rich texture. The most famous example of a round is probably "Row, Row, Row Your Boat," in which the same melody is sung by different voices at different times.
  • Fugue: A fugue is a type of canon in which a single melodic subject is repeated and imitated by multiple voices, each entering at a different time. Fugues are a common form in Baroque music and are often characterized by their complex, contrapuntal textures and strict, formal structure.
  • Canon at the octave: A canon at the octave is a type of canon in which the voices imitate the melody at an interval of an octave (eight scale degrees) above or below the original melody. This creates a harmonically rich texture and can add depth and complexity to the music.

One well-known example of a canon in music is the Canon in D by Johann Pachelbel. This piece is a three-voice canon in which the voices enter in a strict, imitative fashion, with each voice beginning a few measures after the previous one. The melody is relatively simple and is based on a repeating four-measure phrase that is repeated throughout the piece. The voices enter in a consistent order, with the top voice entering first, followed by the middle voice, and finally the bottom voice. The piece is harmonically straightforward, with the voices moving in parallel motion and outlining a series of chords in the key of D major.

Imitation counterpoint is a type of counterpoint in which one voice imitates the melody of another voice, either exactly or with some variations. Imitation is a common technique in counterpoint and is used to create a sense of unity and coherence among the voices.

In imitation counterpoint, the imitating voice typically enters a short time after the original melody, creating a call-and-response effect. The imitating voice may repeat the melody exactly, or it may vary it slightly by changing the rhythm, the melody, or the intervals between the notes. The imitating voice may also introduce new melodic or rhythmic elements, as long as it remains harmonically consistent with the original melody.

One well-known example of imitation counterpoint is the Fugue in D minor from The Well-Tempered Clavier, Book 1 by J.S. Bach. This fugue is a three-voice piece in which the voices enter in a strict, imitative fashion, with each voice beginning a few measures after the previous one. The subject of the fugue, which is the main melodic idea that is repeated and imitated by the voices, is a four-measure phrase that is characterized by its use of chromaticism and its angular, dissonant intervals. The voices enter in a strict order, with the top voice entering first, followed by the middle voice, and finally the bottom voice. As the piece progresses, the voices engage in a complex interplay of imitation and variation, creating a harmonically rich and intricate texture.

Finally, a countermelody is a secondary melody that is played or sung at the same time as the main melody in a piece of music. It is typically played by a different voice or instrument and serves to add interest, variety, and harmonic complexity to the music.

One well-known example of a countermelody is the violin melody that accompanies the main piano melody in the first movement of Beethoven's "Moonlight Sonata." In this piece, the violin plays a flowing, lyrical melody that complements the more expressive and dramatic melody played by the piano. The two melodies interact and support each other, creating a harmonically rich and emotionally powerful musical texture.

Other Textural Devices

There are a few more textural devices you should know: a solo/soli and accompaniment, doubling, ostinato, and tutti 

solo is a musical performance by a single performer, while soli (the plural of "solo") refers to a section of a musical composition or performance in which a group of performers plays or sings together.

Here are examples of solos and soli:

  • Solo: One well-known example of a solo is the violin solo in the first movement of Beethoven's Violin Concerto. In this piece, the violin plays a virtuosic and expressive melody that stands out against the accompaniment provided by the orchestra.
  • Soli: An example of soli is the section in the overture to Mozart's The Marriage of Figaro in which the orchestra plays a fast and energetic melody in unison. This section is a soli in which all of the instruments in the orchestra play together, creating a bold and powerful sound.

A solo or soli might be played with an accompaniment, which is the “background music” to the solo. Usually, the accompaniment is relatively unobtrusive, allowing the solo to shine through. 

Doubling in music refers to the practice of having multiple performers play or sing the same part in a piece of music. Doubling can be used to create a fuller, more harmonically rich sound, or it can be used to create a sense of balance or clarity within the ensemble. 

Two voices might double each other exactly, or they might be an octave apart. In chamber music, this is often used to highlight the melody of the piece. 

Next, an ostinato is a musical device in which a short melodic or rhythmic phrase is repeated over and over again. Ostinatos are often used to create a sense of energy and momentum in a piece of music and can help to drive the rhythm and pulse of the piece. They can also be used to create a sense of repetition and stability, and can help to establish a sense of musical form within a piece. 

One example of an ostinato in classical music is the "toccata" motive in Bach's Toccata and Fugue in D Minor. This motive is a short, rhythmic pattern that is repeated throughout the piece and serves as the foundation for the rest of the music. The motive is played by the organ in a fast, virtuosic fashion and helps to create a sense of energy and excitement. The repetition of the motive creates a sense of stability and helps to establish the form of the piece.

While there is some overlap between ostinatos and motives, there are some key differences. Ostinatos are characterized by their repetition and stability, while motives can be varied and developed throughout a piece of music. Additionally, ostinatos often serve as a foundation or accompaniment for the rest of the music, while motives can be more structural and thematic in nature.

Finally, tutti is an Italian term that means "all" or "everyone." In music, it is typically used to refer to a passage or section in which all of the performers in an ensemble play or sing together. Tutti passages are often characterized by a full, rich, and harmonically complex sound, and they can be used to create a sense of power and impact within a piece of music.

🦜 Polly wants a progress tracker: If you are singing in a school choir, what are the various textures that you may encounter in your own vocal part?

Frequently Asked Questions

How do I identify an Alberti bass when I'm listening to classical music?

Listen for a steady, repeating left-hand figure that outlines the harmony by arpeggiating each chord in the pattern: lowest—highest—middle—highest. That four-note, regular “low–high–mid–high” pattern (often on piano in Classical-era pieces) is the Alberti bass. It sounds like a calm, mechanical accompaniment/ostinato that keeps the harmony moving without changing the chord on every beat. Contrast that with a walking bass (stepwise, independent, often in bass register) or block chords (all notes together). On the AP exam this is a texture device you’d label under DES-1.B.1 (bass-line devices). Practice identifying it in recordings and in scores—the Fiveable Topic 2.12 study guide has examples (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd). For more listening practice and 1,000+ problems, check unit resources (https://library.fiveable.me/music-theory/unit-2) and practice bank (https://library.fiveable.me/practice/music-theory).

What's the difference between canon and imitation in music texture?

Both canon and imitation are polyphonic texture devices, but they differ in strictness. - Imitation: one voice copies a melodic idea from another, but copying can be partial, rhythmically altered, inverted, transposed, or staggered. Imitation is a broad term used anytime one line echoes another (CED keyword: imitation). It’s common in contrapuntal textures and often creates countermelodies. - Canon: a specific, strict type of imitation where one voice repeats another exactly (or with a simple, predictable transformation) at a fixed time interval and usually the same intervals (e.g., a round like “Row, Row, Row Your Boat”). Canons are more rule-driven (CED keyword: canon, stretto when entries overlap tightly). On the AP exam you may be asked to identify these in performed or notated excerpts (DES-1.B). For quick practice and examples, see the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd), the Unit 2 overview (https://library.fiveable.me/music-theory/unit-2), and hundreds of practice problems (https://library.fiveable.me/practice/music-theory).

I don't understand what a walking bass line is supposed to sound like - can someone explain?

A walking bass is a steady, moving bass line—usually in quarter notes—that “walks” through chord tones and stepwise passing notes to outline the harmony. It sounds like a continuous, forward-driving foundation: one note per beat, often alternating chord roots, thirds, fifths, and passing steps (or chromatic approach tones). In jazz you’ll hear it outline ii–V–I progressions; in classical contexts it can be a scalar or arpeggiated bass that connects chords. On the AP exam you may need to identify it in a recording (aural) or in a score as a texture device associated with the bass (DES-1.B.1). To practice, listen for an even quarter-note pulse in the bass and check whether it moves mostly stepwise or through chord tones. For more examples and to reinforce ID skills, see the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd), the Unit 2 overview (https://library.fiveable.me/music-theory/unit-2), and try practice questions (https://library.fiveable.me/practice/music-theory).

What materials do I need to analyze texture devices in sheet music effectively?

You’ll need a few practical materials plus the right habits to analyze texture devices confidently on the AP exam. Essentials: a printed or on-screen score (big enough to mark), a pencil/eraser for labeling devices, colored highlighters or pens to track independent lines (use one color per voice or device), ruler or sticky flags for measure/phrase alignment, and a playback (recording or MIDI) to hear imitation, stretto, hocket, and call-and-response. Tools: a staff paper cheat sheet of common devices and definitions (Alberti bass, walking bass, ostinato/basso ostinato, pedal point, canon/imitation/stretto, countermelody, doubling, solo/soli, tutti, antiphony) and your Roman-numeral/harmonic reference. On the AP, you’ll be asked to identify devices in notated and performed music (DES-1.B), so mark where the bass pattern repeats, where voices enter imitatively, and any persistent ostinato or pedal. For a focused review, see the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and practice with problems (https://library.fiveable.me/practice/music-theory).

How do I write about countermelody in my AP music analysis without sounding repetitive?

Mention concrete musical details instead of repeating “a countermelody.” Tie it to function, relation, and technique (CED DES-1.B: identify texture devices). Use varied verbs and precise descriptors: contrast, imitate, shadow, decorate, respond, double, oppose, or accompany. Note register, rhythm, harmonic role, and motivic relationship. Quick checklist to vary your writing: - Role: “serves as an accompaniment” / “acts as an equal contrapuntal line.” - Relation: “imitates the main theme at the 5th” / “contrasts the melody by using stepwise motion.” - Rhythm: “rhythmically independent with syncopation against the melody’s steady quarter notes.” - Texture/device: “functions as imitation/canon/augmentation/diminution/doubling.” - Harmonic effect: “fills harmonic gaps” / “creates contrary motion to support the cadence.” Sample concise sentences you can rotate: - “A countermelody in the tenor imitates the theme at the interval of a 5th, creating a brief canon.” - “In mm. 8–12 the piano offers a rhythmically independent countermelody that contrasts the vocal line’s long notes.” - “The countermelody doubles the soprano at the octave, reinforcing the tonic while adding textural thickness.” Practice writing 1–2 sentences per example passage and check against the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and Unit 2 overview (https://library.fiveable.me/music-theory/unit-2). For more drills, try the practice problems (https://library.fiveable.me/practice/music-theory).

What's the difference between solo and soli in orchestral music?

Short answer: “solo” means one player has the exposed melody; “soli” means a small group or an entire section plays that exposed line (often in unison or the same part). Both are texture devices that change how many voices carry the principal line—solo thins the texture to a single voice, soli is thicker than solo but thinner than tutti (full ensemble). In scores you’ll see “solo” above a staff to mark a single player (e.g., oboe solo). “Soli” marks a section or group (e.g., “Vlns. soli” for the violins together). On the AP exam, identifying solo vs. soli helps you describe texture (DES-1.B.1)—you might label a passage as “solo with accompaniment” or “soli section, homorhythmic accompaniment” when answering analysis questions. For a quick review of texture devices, check the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and more practice at (https://library.fiveable.me/practice/music-theory).

I'm confused about ostinato - is it just the same thing repeated over and over?

Short answer: mostly yes—an ostinato is a musical pattern repeated persistently—but it’s not always literally identical every time. More detail: an ostinato can be rhythmic, melodic, or harmonic (basso ostinato = repeated bass). It’s listed as a texture device in the CED (DES-1.B.1) along with things like Alberti bass, pedal point, canon, and countermelody. Composers might repeat the exact pattern, vary it (shortened, transposed, ornamented), or layer it under changing material—those still count as ostinato because the repeating idea shapes the texture. Pedal points differ because a stationary pitch underlies changing harmony; an ostinato is a recognizably recurring pattern. On the exam you should be able to identify ostinato in performed and notated examples (Topic 2.12). Practice spotting repeated motives and small variations in the Fiveable study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and drill with practice problems (https://library.fiveable.me/practice/music-theory).

How do I identify doubling when multiple instruments are playing the same part?

Doubling means two or more parts play the same melodic line/pitch-class (exact unison or with octave displacement). To identify it: - In notated scores: look for identical rhythms and pitches between staves/parts. If one part is the same pitch-class but written an octave higher/lower, that’s doubling at the octave. Check instrument labels and stems—identical stems/rhythms across systems = doubling. Note whether it’s labeled tutti/soli or a marked soli/solo passage. - By ear (aural): listen for identical melodic contour and rhythm across timbres; doubled lines sound thicker, clearer, and often louder. Octave doubling keeps the melody recognizable but wider in register. - Context: describe it in your texture analysis using CED terms (e.g., “melody doubled in octaves by flute and violin; accompaniment in piano,” or “doubling in unison—tutti”). On the AP exam you may need to identify doubling in both performed and notated stimuli (DES-1.B.1); be precise about unison vs. octave doubling. For quick review, see the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd). For more practice, try problems in the Unit 2 page (https://library.fiveable.me/music-theory/unit-2) and the practice bank (https://library.fiveable.me/practice/music-theory).

What does tutti actually mean and how is it different from just "everyone playing"?

Tutti literally means “all” in Italian, but in AP texture terms it’s more specific than just “everyone playing.” It’s a texture device that signals the full ensemble (or full section) should play together—usually after a solo or soli passage—so the texture becomes fuller, often louder, and may include doubled parts or denser accompaniment. On the score you’ll see it contrasted with solo/soli; in performance it marks a change in texture rather than only “more people.” For the exam, treat tutti as a label you can identify in both performed and notated music when the composer/score moves from solo to full ensemble (CED DES-1.B; keywords: solo, soli, doubling, accompaniment, tutti). For practice spotting these shifts, check the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and try examples in the Unit 2 review (https://library.fiveable.me/music-theory/unit-2) or the practice problem bank (https://library.fiveable.me/practice/music-theory).

How do I show that I understand texture devices in my portfolio analysis?

Show you understand texture devices by being specific, concise, and evidence-based in your portfolio analysis. Start by naming the overall texture (e.g., homophony, contrapuntal) and then identify 2–4 texture devices using AP vocabulary (Alberti bass, walking bass, ostinato/basso ostinato, pedal point, canon, imitation, stretto, hocket, countermelody, doubling, solo/soli, tutti, antiphony, call-and-response). For each device: give measure numbers (or timestamps), describe how it’s constructed (who plays it, rhythmic/intervallic pattern), and explain its musical role or effect (supports harmony, creates independence, increases density, etc.). If it’s in the bass, note its function (e.g., Alberti bass outlining root–fifth–third pattern); if polyphonic, say whether it’s imitation, canon, or stretto and how voices interact. Link your IDs to AP skill DES-1.B (identify in performed and notated music). Use the Topic 2.12 study guide for examples and phrasing (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd), review unit context (https://library.fiveable.me/music-theory/unit-2), and practice with 1000+ problems (https://library.fiveable.me/practice/music-theory).

What's the best way to practice recognizing these texture devices in both recorded and written music?

Practice two ways each day: aural and notated. For aural practice, pick short recordings (30–60 sec). First listen for overall texture (monophony, homophony, contrapuntal), then listen again and label specific devices from the CED (Alberti/walking bass, ostinato, pedal point, canon/imitation/stretto, countermelody, doubling, solo/soli, tutti, antiphony/call-and-response). Time yourself (45–60 seconds per excerpt) to mirror the AP aural pace. For notated practice, take scores and mark the bass devices and polyphonic entries: circle ostinati, underline imitative entrances, bracket pedals, label doubling. Do 20 scores/excerpts a week. Use the AP exam format to guide practice: Part A aural questions often repeat stimuli—practice listening 3–4 times and answering. Study the Topic 2.12 guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and drill 1000+ practice items (https://library.fiveable.me/practice/music-theory). Track progress with a checklist of the CED keywords and aim to ID each device in under a minute.

I keep mixing up accompaniment patterns - how do I tell them apart?

Think of accompaniment patterns as combos of bass motion, rhythmic shape, and who’s carrying the tune. Quick ID clues: - Alberti bass: repeated broken-chord pattern in the left hand (lowest–highest–middle–highest); steady, arpeggiated feel. - Walking bass: steady stepwise quarter-note motion in the bass outlining harmony (common in jazz/Baroque basso continuo). - Ostinato / basso ostinato: short motif repeated exactly in one voice (listen for exact repetition). - Block chords: homorhythmic chords moving together (density and strong beats). - Arpeggiation: rolled or broken chords that fill texture but don’t repeat Alberti order. - Pedal point: sustained/repeated bass pitch while harmonies change above. - Countermelody vs accompaniment: countermelody has melodic shape and independence; accompaniment supports rhythm/harmony. - Doubling: same melody in another voice or octave (listen for exact pitch matches). On the exam you’ll be asked to name these (DES-1.B) from aural or score examples—focus on bass rhythm, repetition, independence, and range. Practice ID with the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and drill 1000+ practice questions (https://library.fiveable.me/practice/music-theory).

How do I know if a bass line counts as walking bass or if it's just moving notes?

A bass line counts as a walking bass when it functions as an independent, steady-moving bass pattern that outlines harmonic motion—usually a continuous steady pulse (often quarter notes) that moves mostly stepwise or in scalar patterns and hits chord roots or guide tones to connect progressions. If the bass just moves occasionally (passing tones, arpeggiated accompaniment, or isolated leaps) or simply doubles the harmony without a consistent rhythmic pulse, it’s not a walking bass. Key signs: consistent rhythmic profile, mostly stepwise/linear motion, and a sense of “walking” through chord changes rather than filling gaps. On the AP exam you’ll be asked to ID texture devices like walking bass vs. Alberti bass, ostinato, pedal point, etc. (see DES-1.B.1). For a quick refresher, check the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and practice examples at the Unit 2 page (https://library.fiveable.me/music-theory/unit-2) or the practice problems set (https://library.fiveable.me/practice/music-theory).

What's the difference between monophony and having just one melody with accompaniment?

Monophony = one melodic line only. That line can be sung/played by one voice or several in exact unison or octave doubling, but there’s no independent harmony or accompaniment. If you hear a separate bass/chords or an independent second line (countermelody, imitation, ostinato), it’s not monophony. So “one melody with accompaniment” = typically homophony (melody + accompaniment) if the accompaniment supports the tune (block chords, Alberti bass, ostinato). If the other part has its own melodic importance (imitation, countermelody, canon), you move toward polyphony/contrapuntal texture. On the AP exam you should name both the basic texture (monophony/homophony/polyphony) and any devices (accompaniment, doubling, ostinato, countermelody) per DES-1.B.1—practice ID-ing these in examples (see the Topic 2.12 study guide: https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd). For more practice questions, try https://library.fiveable.me/practice/music-theory.

I don't understand how to describe polyphonic texture without just listing all the parts playing at once

Don’t just list who’s playing—describe how the lines relate. For polyphony say: which texture device is happening (imitation, canon/stretto, countermelody, hocket, independent contrapuntal lines), how independent the voices are (equal-voiced contrapuntal vs. melody + accompaniment), and the roles (bass device: Alberti/walking bass, pedal point, basso ostinato; accompaniment: ostinato, block chords, arpeggiation). Note entry points and relationships: “voice A imitates voice B at a 3rd a measure later,” or “two upper voices double the melody in octaves while bass holds pedal.” Mention register, rhythmic interplay (syncopation, staggered entrances), and density (tutti vs. soli). Use measure numbers or time stamps in answers for the AP exam (DES-1.B requires ID in performed and notated music). For more examples and practice, see the Topic 2.12 study guide (https://library.fiveable.me/music-theory/unit-2/texture-devices/study-guide/qeppLtbtfyQ6Z4dE9lMd) and try problems at (https://library.fiveable.me/practice/music-theory).