An ostinato is a musical pattern (melodic, rhythmic, or harmonic) repeated persistently in the same voice throughout a passage. In AP Music Theory, it's one of the texture devices in Topic 2.12 you identify in both performed and notated music under learning objective 2.12.A.
An ostinato is a short musical idea that repeats over and over in the same voice while the rest of the music changes around it. The pattern can be melodic (a repeating bass line), rhythmic (a drum groove that never stops), or harmonic (a looping chord progression). The word comes from the Italian for "obstinate," which is honestly the best memory trick you'll get. The pattern is stubborn. It refuses to change.
In the AP Music Theory CED, ostinato lives in Topic 2.12 (Texture Devices) as one of the terms that describe the unique texture of a passage, alongside solo/soli, accompaniment, doubling, and tutti. It's not a texture type like monophony or homophony. It's a texture device, a specific technique the composer layers into the texture. An ostinato usually acts as the foundation of a passage, giving it continuity while melodies, variations, or improvisations happen on top.
Ostinato sits in Unit 2 (Music Fundamentals II) under Topic 2.12, supporting learning objective 2.12.A, which asks you to identify texture devices in both performed music and notated music. That dual requirement is the whole game. You need to recognize an ostinato when you hear a pattern looping under a melody, and when you see the same figure written out repeatedly in one staff or voice. The CED groups ostinato with other texture vocabulary like Alberti bass, walking bass, canon, imitation, and countermelody, so the exam expects you to tell these devices apart, not just define one in isolation. Describing texture precisely ("melody with an ostinato accompaniment" instead of just "homophonic") is exactly the kind of specific answer AP Music Theory rewards.
Keep studying AP Music Theory Unit 2
Visual cheatsheet
view galleryPedal Point (Unit 2)
Both are stubborn, foundational devices, but a pedal point is one sustained or repeated single pitch (usually in the bass) while harmonies change above it. An ostinato is a repeated pattern with shape and rhythm. If the bass just sits on one note, that's a pedal. If it loops a little figure, that's an ostinato.
Motif (Unit 2)
A motif is a short, recognizable musical idea. An ostinato is basically a motif that gets stuck on repeat in the same voice. Every ostinato is built from a motif, but a motif only becomes an ostinato through persistent repetition.
Riff (Unit 2)
A riff is the popular-music cousin of the ostinato, a repeated catchy pattern in rock, jazz, or funk. On the exam, "ostinato" is the formal texture-device term from the CED, so use it when describing any repeating pattern, classical or not.
Alberti Bass and Walking Bass (Unit 2)
These are the other bass-line texture devices in Topic 2.12. Alberti bass is a specific broken-chord pattern (low-high-middle-high), and walking bass moves stepwise in steady notes. An ostinato is the broader idea of any repeated pattern. Knowing which label fits which sound is a classic multiple-choice setup.
Ostinato shows up in texture-identification questions, both aural and notated. A typical multiple-choice stem plays or shows a passage and asks which texture device is present, with ostinato sitting next to distractors like Alberti bass, pedal point, imitation, or countermelody. Your job is recognition. By ear, listen for a pattern that repeats persistently in the same voice while other parts change. In a score, scan for the same figure written out again and again in one staff. Practice questions in this topic also test the plain definition ("What is an ostinato in music?") and contrast it with related devices like the Alberti bass in Mozart's Sonata No. 16. No released FRQ has hinged on the term itself, but precise texture vocabulary strengthens any answer where you describe what's happening in a passage.
Both involve something repeating or holding steady underneath the music, which is why they get mixed up. A pedal point is a single sustained or repeated pitch, almost always in the bass, that stays put while the harmony moves above it. An ostinato is a repeated pattern with melodic or rhythmic shape, and it can appear in any voice, not just the bass. Quick test: hum the repeating element. If it's just one note, it's a pedal point. If it has a contour or groove, it's an ostinato.
An ostinato is a melodic, rhythmic, or harmonic pattern that repeats persistently in the same voice throughout a passage.
It's a texture device from Topic 2.12, not a texture type, so it describes a technique within the texture rather than the overall texture itself.
Learning objective 2.12.A requires you to identify ostinatos in both performed (aural) and notated (score) music.
An ostinato differs from a pedal point because it's a repeating pattern with shape, while a pedal point is a single held or repeated pitch.
The CED lists ostinato alongside solo/soli, accompaniment, doubling, and tutti as terms that describe the unique texture of a passage.
The Italian word means "obstinate," which is a built-in mnemonic: the pattern stubbornly refuses to change.
An ostinato is a short musical pattern that repeats persistently in the same voice, providing continuity and a foundation for the music above it. In the AP Music Theory CED it's a texture device covered in Topic 2.12 under learning objective 2.12.A.
No. A pedal point is a single sustained or repeated pitch (usually in the bass) while harmony changes above it, but an ostinato is a repeated pattern with melodic or rhythmic shape. If the repeating element is just one note, call it a pedal point.
No. Ostinatos often appear in the bass because they make great foundations, but the CED defines an ostinato by repetition in the same voice, not by register. A repeating pattern in a middle or upper voice still counts.
A motif is any short, recognizable musical idea, while an ostinato is a pattern that's persistently repeated in the same voice. Think of an ostinato as a motif put on a loop.
Yes. It's named in the essential knowledge for Topic 2.12 (Texture Devices), and learning objective 2.12.A asks you to identify texture devices in performed and notated music, so expect it in aural and score-based multiple-choice questions.
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