A non-chord tone (NCT) is a note that doesn't belong to the chord sounding at that moment; it creates dissonance or melodic motion and typically resolves by step to a chord tone, as in passing tones, neighbor tones, and suspensions analyzed throughout AP Music Theory.
A non-chord tone (also called a nonharmonic tone or embellishing tone) is any note that falls outside the chord being played at that moment. If the harmony is a C major triad (C-E-G) and the melody hits a D, that D is a non-chord tone. It doesn't "belong," and that's the point. NCTs create momentary tension or smooth stepwise motion, then resolve back into the harmony.
The big categories you'll analyze are passing tones (stepwise motion connecting two chord tones), neighbor tones (step away and back), and suspensions (a chord tone held over into the next chord, where it becomes dissonant, then resolves down by step). Each type is defined by how the note is approached and how it leaves. That approach-and-resolution pattern is what you identify on the exam, not just the fact that a note clashes. In Unit 5, NCTs even get harmonized into full chords. The pedal and passing ⁶₄ chords are essentially neighbor tones and passing tones dressed up as triads.
Non-chord tones run through the entire harmony and voice-leading sequence, but they get a starring role in Unit 5. Learning objective AP Music Theory 5.7.A asks you to describe the type of ⁶₄ chord in notated music, and the definitions are built directly on NCT logic. Per PIT-2.L.1, the pedal (or neighboring) ⁶₄ happens when the third and fifth of a root-position triad are embellished by their upper neighbor tones over a stationary bass. Per PIT-2.L.2, the passing ⁶₄ harmonizes a bass passing tone in a three-note scale fragment. In other words, if you can spot a neighbor tone and a passing tone, you can spot these chords. Objective AP Music Theory 5.7.B then has you apply those patterns in score analysis, error detection, part writing, and contextual listening. NCTs also matter for harmonic analysis under 5.4.A, because you have to filter out embellishing notes to figure out what the actual chord and Roman numeral are.
Keep studying AP Music Theory Unit 7
Visual cheatsheet
view galleryPassing Tone (Unit 5)
The passing tone is the most common NCT type. It connects two chord tones by step, and in Topic 5.7 it gets promoted to a whole harmony. The passing ⁶₄ chord literally harmonizes a passing tone in the bass.
Neighbor Tone (Unit 5)
A neighbor tone steps away from a chord tone and comes right back. The pedal (neighboring) ⁶₄ chord is this idea in two voices at once, with the third and fifth of a triad embellished by their upper neighbors while the bass holds still.
Suspension (Unit 5)
A suspension is an NCT created by timing. A chord tone is held over into a new chord where it no longer fits, then resolves down by step. It's the NCT you're most likely to mislabel because the dissonant note used to be correct.
Dissonance (Units 1-5)
NCTs are the main engine of controlled dissonance in 18th-century style. The rules about how each NCT type is approached and resolved exist so the dissonance always has a clear path back to consonance.
Multiple-choice questions ask you to identify what a non-chord tone is, name the specific type (passing tone, neighbor tone, suspension), and distinguish NCTs from chord tones in a melody or score excerpt. The trap answers usually mix up the approach-and-resolution patterns, so know each type's signature motion. NCTs also show up indirectly whenever you do harmonic analysis. Before you assign a Roman numeral, you have to decide which notes are structural and which are embellishments. In Topic 5.7, recognizing the passing and pedal ⁶₄ chords depends entirely on hearing or seeing the NCT pattern underneath them. On the part-writing FRQs, NCT logic governs the ⁶₄ procedures, such as doubling the fifth of a passing ⁶₄ and moving all voices by step (PIT-4.F.1).
Both are dissonant and both resolve down by step, so they sound similar, but a chordal seventh is a chord tone. In a V⁷ chord, the seventh belongs to the chord and gets its own resolution rule. A non-chord tone never belongs to the chord at all. Quick test: spell the chord. If the dissonant note is part of the spelling, it's a chordal seventh, not an NCT.
A non-chord tone is any note that doesn't belong to the chord sounding at that moment, and it typically resolves by step to a chord tone.
NCT types are defined by motion, not just dissonance. Passing tones move by step between chord tones, neighbor tones step away and return, and suspensions hold a note over into a new chord before resolving down.
The pedal and passing ⁶₄ chords in Topic 5.7 are neighbor tones and passing tones harmonized into full chords, usually on weak beats.
When doing harmonic analysis, filter out non-chord tones first so embellishing notes don't trick you into the wrong Roman numeral.
When part-writing a passing ⁶₄ chord, double the fifth and move all voices by step, which keeps the NCT logic intact in four parts.
It's a note that doesn't belong to the chord being played at that moment. NCTs create tension or stepwise melodic motion and resolve to a chord tone, with passing tones, neighbor tones, and suspensions being the main types on the exam.
No. While most NCTs create dissonance against the harmony, what defines them is membership, not sound. If the note isn't in the chord's spelling, it's a non-chord tone, even if it happens to sound fairly smooth.
A chord tone is part of the chord's spelling (root, third, fifth, or seventh), while a non-chord tone falls outside it. Spell the chord and check. In a C major triad, C, E, and G are chord tones, and any other melody note over it is an NCT.
Two of the ⁶₄ chord types in Topic 5.7 are built from NCT patterns. The pedal ⁶₄ comes from upper neighbor tones over a stationary bass (PIT-2.L.1), and the passing ⁶₄ harmonizes a passing tone in the bass (PIT-2.L.2).
Yes. A suspension is a chord tone that gets held over into a new chord where it no longer fits, which makes it a non-chord tone at that moment. It then resolves down by step into the new harmony.