SingaporeMusicSyllabus dot point

How do you describe the melody and harmony of an extract precisely, including its shape, intervals, chords and cadences?

Describe the melodic shape, range and devices of a heard melody, and identify its harmony, primary chords and cadences using accurate vocabulary

A focused answer to the O-Level Music listening outcome on melody and harmony. Describing melodic shape, range, conjunct and disjunct motion and devices such as sequence, plus identifying primary chords and perfect, imperfect and plagal cadences, with a worked listening walkthrough.

Generated by Claude Opus 4.810 min answerUpdated 2026-06-06

Reviewed by: AI editorial process; not yet individually human-reviewed

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What this dot point is asking
The answer
Examples in context
Try this

What this dot point is asking

SEAB wants you to describe a heard melody, its shape, range, motion and devices, and to identify its harmony, especially the primary chords and the cadences that punctuate it. The central insight is that melody and harmony are described with a shared, precise vocabulary: instead of saying a tune goes up or sounds nice, you name its contour, its conjunct or disjunct motion, its devices, the chords beneath it, and the cadence at each phrase end.

The answer

Describing melodic shape and motion

A melody has a contour or shape: it may be arch-shaped (rising then falling), ascending, descending, or wave-like. Its motion is conjunct when it moves mostly by step (adjacent notes) and disjunct when it moves by leap (skipping notes). The range is the distance from its lowest to its highest note, narrow or wide. The high point of a melody is its climax.

Melodic devices

Common devices to listen for and name:

Sequence: a short figure repeated at higher or lower pitches.
Motif: a short, memorable idea that recurs and is developed.
Repetition: an exact restatement of a phrase.
Imitation: one part copies another a little later.
Ornamentation: decorative notes such as trills or grace notes.

Identifying harmony and primary chords

Harmony is the chords that support the melody. The three primary chords are built on the first, fourth and fifth degrees:

Chord I (tonic), the home chord.
Chord IV (subdominant).
Chord V (dominant), which pulls strongly back to I.

Much music can be harmonised with just these three, so hearing whether a passage rests on I, IV or V is the foundation of harmonic listening.

Cadences

A cadence is the chord progression that ends a phrase, like punctuation:

Perfect cadence: V to I, conclusive, a full stop.
Imperfect cadence: ending on V, open and unfinished, a comma.
Plagal cadence: IV to I, the gentle amen ending.
Interrupted cadence: V to vi, a surprise that avoids the expected close.

Listening to the final two chords of each phrase and to the sense of closure is how you name the cadence.

Worked example

You hear an eight-bar tune in two four-bar phrases. Walk through describing its melody and naming the cadence at each phrase end.

Step 1: Trace the melodic shape and motion

The first phrase rises steadily by step from a low start, so it is conjunct and ascending. The second phrase leaps up to the highest note (the climax) then falls back, mixing disjunct leaps with stepwise descent. Overall the tune is arch-shaped with a fairly wide range.

Step 2: Listen for a melodic device

The opening three-note figure returns one step higher at the start of bar three, then higher again, so the melody uses a rising sequence. This is worth naming explicitly.

Step 3: Hear the harmony under each phrase

Each phrase is supported mostly by the primary chords. The first phrase moves through I and IV and rests on V at bar four; the second phrase passes through IV and V before the ending.

Step 4: Name each cadence

The first phrase ends on chord V, unresolved, so it is an imperfect cadence (a comma). The second phrase ends V to I, conclusive, so it is a perfect cadence (a full stop). The full description: an arch-shaped, partly sequential melody, mixing conjunct and disjunct motion, harmonised by primary chords, with an imperfect cadence then a perfect cadence.

Examples in context

Example 1. A folk-song melody. Many folk tunes are largely conjunct with a modest range and clear phrasing, harmonised by just the three primary chords, ending each verse with a perfect cadence. Describing such a melody is excellent practice for the contour, motion and cadence vocabulary the exam expects.

Example 2. A hymn with a plagal amen. A hymn often closes its final verse with a plagal cadence, the soft IV to I amen, after the main perfect cadences of the verses. Recognising that gentler, non-dominant close, and naming it plagal, is a precise harmonic observation that markers reward.

Try this

Q1. Define conjunct and disjunct motion and give the sound of each. [2 marks]

Cue. Conjunct motion moves by step between adjacent notes, sounding smooth; disjunct motion moves by leap, skipping notes, sounding more angular or wide.

Q2. Name the three primary chords and the scale degree each is built on. [3 marks]

Cue. Chord I (tonic) on the first degree, chord IV (subdominant) on the fourth, and chord V (dominant) on the fifth.

Q3. A phrase ends V to I and the next ends on V alone. Name each cadence. [2 marks]

Cue. V to I is a perfect cadence (conclusive); ending on V alone is an imperfect cadence (open and unfinished).

Exam-style practice questions

Practice questions written in the style of SEAB exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.

Original5 marksA melody rises mostly by step to a high point in its second phrase, then falls by leap to a low ending. Describe this melody using correct terms, covering its shape, motion, range and at least one device.

Show worked answer →

Shape: the melody is arch-shaped overall, rising to a climax (high point) in the second phrase before falling away.

Motion: the rise is largely conjunct (by step), while the descent uses disjunct motion (by leap), giving contrast between the two halves.

Range: the melody spans from its low ending up to the climax, a fairly wide range that the leaps at the end emphasise.

Device: if the rising figure is repeated at successively higher pitches it is a sequence; a repeated short idea would be a motif. Either named device gains credit.

What markers reward: correct use of shape (arch), motion terms (conjunct, disjunct), a sense of range, and at least one correctly named melodic device. Loose phrases such as it goes up and down score little; conjunct rise to a climax then disjunct fall scores well.

Original4 marksTwo phrases end with clear cadences. The first sounds unfinished, resting on the dominant; the second sounds fully closed, moving dominant to tonic. Name each cadence and explain how you recognised it.

Show worked answer →

The first cadence is imperfect (a half cadence): it ends on chord V (the dominant), so it sounds open and unfinished, like a comma.

The second cadence is perfect: it moves V to I (dominant to tonic), so it sounds conclusive and closed, like a full stop.

Recognition: I listened to the final two chords of each phrase and to the sense of closure. Ending on the dominant, unresolved, signals imperfect; resolving from the dominant onto the tonic signals perfect.

What markers reward: the correct cadence name for each, the chords involved (V for imperfect, V to I for perfect), and a recognition cue tied to the sense of closure. Confusing imperfect with interrupted, or naming chords the wrong way round, loses marks.