Develop an Original Melody from a Small Motif

Develop an original melody from a small motif

A short motif gives a melody something recognisable to develop. Repeating it creates a connection; moving it to a new scale position creates related motion; changing the ending helps the phrase arrive somewhere. The challenge is to make those choices deliberately while keeping every bar complete and every pitch within the agreed range.

Our original model uses C major, 2/4, eight complete bars and the range C4 to A4. C4 means middle C. Each bar contains two crotchet beats. Crotchets are quarter notes, quavers are eighth notes and minims are half notes. The melody has no upbeat, rests, lyrics or accompaniment. It is a notation and composition study; you can follow its full pitch-duration table without an audio recording.

1. Write a brief that you can actually check

• Use only C-major scale pitches within C4–A4.
• Build bars 1–4 as the first phrase, with a held G at its end.
• Build bars 5–8 as a related answering phrase, ending on held C.
• Include an exact repetition and an explicitly identified diatonic sequence.
• Keep every bar at two beats, and make the ending differ from the opening motif.

These are choices for this exercise, not rules for every melody. A different range, metre or ending could be equally valid under another brief. Here the constraints let us assess decisions consistently. “Make it good” is too vague to check; “retain the motif’s rhythm while moving it up one scale step” specifies an observable musical operation.

2. The complete eight-bar model

The motif in bar 1 is C4 quaver, D4 quaver, E4 crotchet. Its rhythm is short–short–long, and its pitch outline moves upward by step twice. Those two features give us a compact identity to recognise. The duration sum is 1/2 + 1/2 + 1 = 2 beats. The model keeps the motif simple enough that later changes can be heard or read as transformations.

3. Worked version one: exact repetition

Bar 2 repeats bar 1 without changing any pitch or duration: C4 quaver, D4 quaver, E4 crotchet. It is exact repetition. Repeating only the rhythm with different pitches would still provide a relationship, but it would not be an exact repetition of the entire motif. The word “exact” is useful only when both the pitch and rhythm ledgers agree.

The repeated bar gives the opening idea a second presentation before it develops. More repetition is possible, but repeating the same bar for all eight bars would fail this particular brief’s sequence and contrasting-ending requirements. The purpose of the repeat is therefore local: make the motif clear, then give it somewhere to go.

4. Worked version two: a diatonic sequence

Bar 3 moves the motif up one scale step: D4 quaver, E4 quaver, F4 crotchet. C becomes D, D becomes E, and E becomes F. The rhythm and upward stepwise contour remain recognisable. This is a diatonic sequence because the movement stays within the C-major collection.

Check the distances carefully. C–D–E contains two whole steps. D–E–F contains a whole step followed by a half step. The sequence preserves scale-step relationships, not every semitone distance. Writing F sharp would preserve two whole steps but would violate the chosen C-major pitch collection. Naming the device precisely prevents an accurate transformation from being marked wrong for the wrong reason.

Bar 4 pauses on a G4 minim. Its two-beat length contrasts with the motif’s three attacks and creates a clear phrase boundary. In this unaccompanied model, call it a melodic pause on scale degree five. Do not assert a particular harmonic cadence when no chords have been supplied.

5. Worked version three: repair an awkward range leap

A rejected draft for bar 6 used C4 crotchet followed by C6 crotchet. Its duration total is correct, but C6 lies outside the specified C4–A4 range. The two-octave jump also interrupts the compact shape being developed. The flaw is not that large leaps are always forbidden; it is that this leap breaks the agreed limits and the intended contour.

The repaired bar uses A4 crotchet, G4 crotchet. After bar 5’s E4–F4–G4, it rises to the model’s high point A4 and then steps back to G4. The bar still has two attacks and two beats. Its revision changes the pitch plan while preserving the planned rhythmic contrast. The preceding G4 to A4 and following G4 to F4 are both steps, so the repair fits its neighbours.

6. Make the ending answer the opening

Bars 5–8 form E4–F4–G4, A4–G4, F4–D4, then C4 held for two beats. The second phrase starts with the motif’s short–short–long rhythm, reaches a modest high point, and descends toward the tonic. Bar 7’s F4 to D4 is a descending third; D4 then steps to the final C4. The final minim contrasts with the opening’s moving quavers.

The ending supports a C-centred melodic close through register, approach and duration. It does not prove V–I harmony, because there is no bass or chord part. If a later arrangement supplies harmony, its cadence must be checked from that new evidence. Keeping melody and harmony claims separate makes the current analysis more accurate.

7. Three continuation decisions, with solutions

1. To repeat the motif exactly, choose C4 quaver–D4 quaver–E4 crotchet or C4 crotchet–D4 quaver–E4 quaver. Answer: choose the first. The second preserves the pitch order but changes which note receives the longest duration.

2. Move D4–E4–F4 up one C-major scale step, keeping the two-quaver-and-crotchet rhythm. Answer: E4 quaver, F4 quaver, G4 crotchet. F sharp is not needed. The result is another diatonic sequence, with semitone intervals allowed to change.

3. The final bar contains C4 crotchet only. Give two legal completions that keep the C-centred close. Answer: extend C4 to a minim, as the model does, or add a crotchet rest after it. Both fill two beats; one sustains the tone and the other finishes with silence.

Frequently asked questions

What is the motif in the model?

It is C4 quaver, D4 quaver, E4 crotchet: an ascending three-note idea with a short–short–long rhythm.

Is repeating just the rhythm exact repetition?

It repeats one feature. Exact repetition of this motif requires both the pitches and their durations to match.

What makes bar 3 a sequence?

It moves each motif note up one C-major scale step while retaining the rhythm and upward contour.

Must a diatonic sequence preserve every semitone interval?

No. It preserves the scale-based movement while staying within the chosen collection. Whole steps and half steps can therefore change places.

Are large leaps always wrong?

No. The rejected leap is wrong for this particular range and contour brief. Other compositions may use large leaps deliberately.

Does the final C prove a perfect cadence?

No. It supports a melodic tonic close. A V–I cadence claim also needs the appropriate chord evidence at the phrase ending.

Is this the only acceptable eight-bar answer?

No. Other independently composed melodies can meet the same constraints. Explain and check your choices rather than treating the model as an official answer.

Reference notes

Terminology follows common-practice Western notation. These sources support the definitions; the scores, questions and solutions above are independently composed.

• Open Music Theory, named chapter author(s), VIVA academic open textbook: Introduction to Harmony; phrase model
• Open Music Theory, named chapter author(s), VIVA academic open textbook: Scale Degrees; Key Signatures
• Open Music Theory, named academic chapter author(s), VIVA: Motives; Segmentation Analysis
• Open Music Theory, named academic chapter author(s), VIVA: Overview
• Open Music Theory, named academic chapter author(s), VIVA: Opening diatonic/chromatic distinction only