Motifs and Phrasing
A motif is a short, recognisable combination of rhythm and pitch shape. A phrase is a larger musical thought built from one or more motifs and directed toward an arrival, pause or continuation.
- motif: short identity
- phrase: larger direction
- develop before adding material
Where you run into this
- Classical
- Film music
- Pop
- Jazz
- Game music
The progression
- I
- IV
- V
Build one motif
Use the notes C-D-G with the rhythm short-short-long. The identity comes from both parts:
- pitch shape: step up, then leap up
- rhythm: two short notes followed by one long note
Change the rhythm completely and recognition weakens. Keep the rhythm but reverse the intervals and the connection remains possible. A motif is a bundle of cues, not only a note count.
Five ways to develop it
| Technique | Example from C-D-G | What remains |
|---|---|---|
| repetition | C-D-G | everything |
| sequence | D-E-A | interval shape and rhythm |
| inversion | C-B-F | rhythm; directions reverse |
| augmentation | same notes, double durations | pitches and proportions |
| fragmentation | C-D | one recognisable part |
Transposition moves the entire motif to a new pitch level. Sequence is a repeated transposition pattern, often moving step by step through a passage.
Test recognition
Play the original after every variation. Ask which feature connects the new form to C-D-G: rhythm, contour, interval pattern or ending note.
If no feature remains clear, you may have written a new motif. That can still be useful, but it changes the job of the passage.
From motif to phrase
A phrase needs direction across time. Harmony, metre, register and cadence help a small motif become a complete thought.
Try four bars:
- bar 1: C-D-G
- bar 2: repeat one step higher
- bar 3: fragment C-D and repeat it faster
- bar 4: lengthen a chord tone over the cadence
The continuation gains momentum through shorter fragments, then releases it with a longer final note.
Period and sentence
Period. Present a two-bar idea and end the first four-bar phrase with an open cadence. Repeat or vary the opening, then close the second four-bar phrase more strongly. The relationship resembles question and answer.
Sentence. State a basic idea, repeat it, then continue by fragmenting, accelerating or sequencing the material toward a cadence. The relationship resembles presentation followed by development.
| Model | Bars 1-4 | Bars 5-8 |
|---|---|---|
| period | antecedent, relatively open | consequent, more closed |
| sentence | basic idea plus repetition | continuation and cadence |
Real music often modifies these proportions. The models help you hear function; they are not mandatory templates.
Phrase endings
A phrase can close through a cadence, a long note, a rest, a repeated rhythmic ending or a drop in register. Several cues working together make the boundary clearer.
Remove the harmony and clap only the rhythm. If the ending remains audible, phrasing is present in the melody itself.
An eight-bar exercise
- Write one motifthree pitches and one rhythm.
- Repeat it oncepreserve recognition.
- Sequence or invert itcreate contrast from the same source.
- Fragment itshorten the idea as the phrase develops.
- Cadence in bar 4leave it relatively open.
- Reuse the opening in bar 5let memory connect the halves.
- Change the final cadencemake bar 8 more conclusive.