Before writing the final mini-composition, decide what should stay consistent and what should change between sections.
Each section below is labeled with the target it teaches. The questions and your Noteflight task practice every target.
Reflective · Thinker — Thinking: make and justify expressive choices that shape a complete musical statement.
Use what you're learning to notice this in the music you already know, and be ready to apply it in your next Noteflight task.
Inquiry: What did you decide should stay the same, and what should change, between the sections of your piece?
Reflect: What did “Plan, Compose, Revise” teach you about your own composing choices?
In Lesson 1 you learned to recognize A and B sections. For a full composition, decide the form first and write it down as a section map: for each section, the measures it covers, what stays consistent, and what changes. Planning this way keeps a longer piece from wandering.
The “Twinkle” melody (the theme of Mozart’s Variations, K. 265) is a complete ABA form in twelve measures. A (mm. 1–4) opens and closes on the home tone. B (mm. 5–8) stays higher and ends open, on D. A returns (mm. 9–12) and closes the piece.
A strong B section changes at least two elements so the contrast is clearly audible, and keeps at least one so it still belongs to the same piece. Good candidates to change: register, rhythm, accompaniment pattern, dynamics. Good candidates to keep: key, tempo, the motive.
Contrast does not mean starting over. In a well-built piece, the B section usually grows out of material from A, transformed with the techniques from Unit 4: sequence, rhythmic variation, contour variation, or a changed ending. The listener hears something new that is still clearly related.
Look at the orange notes. The second half of A (F F E E D D C) is moved up a step to become B (G G F F E E D). B is a sequence of A’s descending segment, which is why the contrast feels connected.
The third phrase of “Ode to Joy” is its contrasting phrase: it introduces a new eighth-note figure and skips, where the first two phrases moved mostly by step in quarter notes. It still keeps the quarter-note pulse and the narrow range, so it sounds like the same piece.
Revise with two questions. Clarity: can a listener hear where each section begins and recognize the motive when it returns? Expression: do the dynamics, articulation, and register support the character of each section? Below, a B-section opening is revised for clarity.
Revision note: On playback, the draft B section sounded like a different piece. Nothing in it connected to the motive, so the form was hard to follow. I rebuilt its opening from the motive: the same repeated note and leap up a 4th, in half and quarter notes instead of eighths. Now B sounds new but related.
The note identifies a clarity problem heard on playback, the specific fix, and how the fix connects to the motive.
This is the section map for the course model you will study in Composition 7. Here is its A section: the Unit 4 course motive, a sequence, and I–IV–V accompaniment from Units 5–6.
| Section | Measures | Motive | Stays consistent | Changes |
|---|---|---|---|---|
| A | 1–8 | Stated, then sequenced up a step | — | Establishes key, tempo, flowing broken chords, mf |
| B | 9–16 | Rhythmic variation (longer values), sequenced | Key, tempo, motive’s shape | Higher register, repeated staccato chords, p growing to f, open ending |
| A′ | 17–24 | Returns unchanged | mm. 1–6 exactly | New ending: climbs to high C and fades to p |
Model description: “Long Way Home” uses ABA form. The A section states the course motive and sequences it up a step, over flowing broken chords at mf. The B section keeps the key, tempo, and the motive’s shape, but changes the rhythm to longer values, moves the melody higher, switches the accompaniment to repeated staccato chords, and grows from p to f. When A returns, its first six measures are unchanged so the listener recognizes home, and a new ending climbs to high C and fades.
The description names the form, what stays consistent, what changes in each section, and how the motive travels through all of them.
Pick an answer for each question. You will see right away whether you are correct and why.
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1Listen only. What is the form of this melody?
2Which B-section plan creates the clearest contrast while keeping the piece unified?
3How does Twinkle’s B section carry material from A?
4Play both B-section openings. Which one carries the motive (G G C B A G) into the new section?
5On playback, you can’t tell where your B section starts. Which revision fixes that most directly?
6In the “Long Way Home” plan, why do the first six measures of A′ return unchanged?
This lesson is the planning stage for Composition 7. Make your section map, compose the opening of your piece, and revise one spot for clarity or expression.
Write a section map for an AB or ABA piece of about 16–24 measures: for each section list the measures, how your motive appears, what stays consistent, and at least two elements that change. Compose your A section and the first four measures of B, then listen and revise one spot for clarity or expression, with a revision note.
Sections, measures, motive, what stays, what changes.
Build the start of B from your motive using a Unit 4 technique.
Listen, find the least clear spot, and revise it.
Keep your section map beside you and check each section against it as you compose.
Label each appearance of your motive and the technique used (sequence, rhythmic variation, contour variation, changed ending).
Play it back. Can you hear where B starts? Does each section’s expression fit its character? Revise one spot and write a revision note.
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Finish the Noteflight work above, then mark this lesson done when you finish.