In AP Music Theory, a turn is a melodic ornament that circles its main note in four quick steps. The melody moves up to the upper neighbor, back to the main note, down to the lower neighbor, and back to the main note again, decorating one pitch with stepwise motion.
A turn is a melodic ornament built entirely out of neighbor-tone motion. Take one main note, then "turn" around it. The figure goes upper neighbor, main note, lower neighbor, main note (or starts on the main note first, depending on the style). Either way, you end up with a quick four-or-five-note flourish that decorates a single pitch without ever leaving stepwise motion.
Here's the useful mental shortcut. A turn is basically an upper neighbor tone and a lower neighbor tone fused into one gesture. If you already understand neighbor tones from the embellishing-tones material, you already understand what a turn is doing. Composers in the Common Practice Era often wrote turns as a symbol (a sideways S) above the note instead of writing out every pitch, the same way trills and mordents get shorthand symbols. The notes of the turn are dissonant decorations; the main note is the one that actually belongs to the harmony.
Turns live in the embellishment side of the course, alongside the embellishing tones and melodic devices covered in Unit 6 (Harmony and Voice Leading III: Embellishments, Motives, and Melodic Devices). The CED's core list of embellishing tones (passing tones, neighbor tones, anticipations, appoggiaturas, suspensions) is where the exam spends its energy, and the turn is the ornament that packages two of those, the upper and lower neighbor, into one figure. Knowing turns helps you in two practical ways. First, when you analyze a score and see a cluster of fast stepwise notes around one pitch, you can identify which notes are chord tones and which are decoration. Second, when you sight-sing, a turn figure is just neighbor motion, so you can read it calmly instead of panicking at the flurry of noteheads.
Keep studying AP Music Theory Unit 6
Visual cheatsheet
view galleryMordent (Unit 6)
A mordent is essentially half a turn. It alternates the main note with just one neighbor (upper or lower) and snaps back, while the turn visits both neighbors. If you can tell these two apart, ornament-identification questions get easy.
Trill (Unit 6)
A trill rapidly alternates the main note with its upper neighbor over and over, while a turn makes one controlled loop through both neighbors. In Common Practice Era music, trills often end with a turn figure, so the two ornaments literally show up glued together.
Appoggiatura (Unit 6)
Both are expressive decorations, but an appoggiatura is an accented dissonance approached by leap that resolves by step, while a turn never leaps at all. Comparing them is a good way to see that embellishments differ by how they approach and leave the main note.
Consonant and Dissonant intervals (Unit 2)
A turn works because of the consonance-dissonance contrast you learn early in the course. The neighbor notes create brief dissonance against the harmony, and the return to the main note resolves it. That tiny tension-release cycle is what makes the ornament expressive.
No released FRQ asks you to define a turn by name, and ornaments like turns sit at the edge of the tested material rather than the center. Where this knowledge actually pays off is recognition and performance. In multiple-choice score analysis, you may need to sort decorative notes from chord tones, and a turn is just two neighbor tones in a row. That's the same reasoning skill behind practice questions that ask you to distinguish embellishing tones, like telling an escape tone from a neighbor tone by how each resolves. In the sight-singing FRQs (like the 2017 and 2019 melodies), turn-like figures show up as quick stepwise loops around a pitch. If you recognize the shape, you sing the main note confidently and treat the surrounding notes as neighbors instead of sight-reading four "random" pitches.
Both are short ornaments written as symbols above a note, but they trace different shapes. A mordent alternates the main note with one neighbor (a single quick bite: main note, neighbor, main note). A turn travels through both neighbors (upper neighbor, main note, lower neighbor, main note), making a full loop around the pitch. Quick check: one neighbor means mordent, both neighbors means turn.
A turn is a melodic ornament that decorates one main note by moving through its upper neighbor, back to the main note, down to its lower neighbor, and back again.
Think of a turn as an upper neighbor tone and a lower neighbor tone combined into a single four-note flourish.
A turn uses both neighbors, a mordent uses only one, and a trill rapidly repeats the upper neighbor; that's the fastest way to tell the three ornaments apart.
The neighbor notes in a turn are dissonant decorations, and only the main note belongs to the underlying harmony, which matters when you label chord tones in score analysis.
In sight-singing, recognizing a turn figure lets you read a cluster of fast notes as simple stepwise neighbor motion around one pitch.
A turn is a melodic ornament that circles a main note with stepwise motion. The standard pattern is upper neighbor, main note, lower neighbor, main note, often written as a sideways-S symbol above the note instead of being written out.
No. A trill rapidly alternates the main note with its upper neighbor many times, while a turn makes one loop through both the upper and lower neighbors. Trills in Common Practice Era music often finish with a turn, but they are distinct ornaments.
A mordent alternates the main note with just one neighbor, so it's a quick three-note figure. A turn visits both the upper and lower neighbors, making a four-note loop around the main pitch.
You won't be asked to define a turn on an FRQ, but the skill behind it is tested constantly. The exam expects you to identify embellishing tones like neighbor tones in scores and to sing stepwise flourishes in the sight-singing FRQs, and a turn is just two neighbor tones in sequence.
Replace the single main note with the four-note pattern: the note a step above, the main note, the note a step below, then the main note again. For example, a turn on C becomes D, C, B, C, fit into the original note's rhythmic value.