<article class="blog-post">Most students who sit AMEB Grade 4 or 5 music theory can tell you what harmonisation is. They know you’re supposed to add chords. They know there are rules. What they can’t always do is apply those rules simultaneously, under exam conditions, without making the exact mistakes that cost marks.Harmonisation is consistently the section where the most marks are lost across AMEB Grades 4 and 5. Not because it’s mysterious — but because it requires every skill from the earlier grades to be working at once: key signatures, chord construction, cadences, voice-leading rules. When any one of those isn’t solid, harmonisation breaks down.This guide explains exactly what AMEB harmonisation requires at each grade, the specific mistakes that appear most often, and a practical approach for getting it right.MusoLearn is not affiliated with AMEB, ABRSM, or Trinity Guildhall.<hr><h2 id="2369bf6c-c041-4b67-8cd1-ac4916d2ebf4" data-toc-id="2369bf6c-c041-4b67-8cd1-ac4916d2ebf4" style="font-size: 24px; line-height: 1.2;">Why Harmonisation Is the Hardest Section in AMEB Theory</h2>Harmonisation does not appear before Grade 4. It is the point at which AMEB music theory shifts from learning individual concepts to applying them all together in a single task.At Grade 4, a student is given a soprano (melody) line and asked to add the alto, tenor, and bass voices to produce a complete four-part SATB texture. Every chord choice must be justifiable. Every pair of adjacent voices must follow specific movement rules. Cadences must fall in the right places. And none of the prohibited errors — parallel fifths, parallel octaves, doubled leading notes, overlapping parts — can appear anywhere in the passage.The difficulty is not any single rule. It is the fact that satisfying one rule can accidentally break another. A student who understands each rule individually will still make errors when they haven’t yet developed the habit of checking everything simultaneously.<hr><h2 id="cd03e56b-eec4-43c3-a36a-90b4b7e3c52b" data-toc-id="cd03e56b-eec4-43c3-a36a-90b4b7e3c52b" style="font-size: 24px; line-height: 1.2;">What Grade 4 Harmonisation Asks You to Do</h2>At Grade 4, the harmonisation task gives students a soprano melody and asks them to write the remaining three voices in four-part vocal style. The passage is typically six bars long.What you are working with:<ul><li>Root position triads (I, II, IV, V, VI, VII) — the foundation of every chord choice</li><li>First inversion triads (Ib, IIb, IVb, Vb) — used to smooth the bass line and avoid awkward leaps</li><li>All cadence types — perfect (V–I), plagal (IV–I), imperfect (I–V, II–V, IV–V), and interrupted (V–VI) — these must be correctly placed at phrase endings</li></ul>The rules you must follow:<ul><li>No parallel fifths or octaves — if two voices move in the same direction and maintain the same interval between them, it is penalised</li><li>Never double the leading note — the seventh degree of the scale should not appear in two voices simultaneously</li><li>No voice-crossing — bass must stay below tenor, tenor below alto, alto below soprano</li><li>No overlapping — a voice cannot move to a note higher than where the voice above it just was, or lower than where the voice below it just was</li><li>Voice ranges — soprano (C4–G5), alto (G3–C5), tenor (C3–G4), bass (E2–C4)</li></ul><img src="https://ezycourse.b-cdn.net/2442/cmq0ax1g6ciz2ulqmg2w8djt5.png" alt="image" containerstyle="width: 100%; height: auto; cursor: pointer; " wrapperstyle="display: flex">A Grade 4 harmonisation question and sample answer from MusoLearn <a target="_blank" href="https://www.musolearn.com/en/course-detail/music-theory-level-4/6170/">Level 4</a>. The soprano melody is given — the task is to add the alto, tenor, and bass. Chord labels in the answer show the full progression.At Grade 4, students also encounter setting verse to music — writing a melody that fits the natural speech rhythm of a given text — and writing an eight-bar melody to a given rhythm. These are separate creative tasks, but they draw on the same harmonic understanding built in harmonisation practice.<hr><h2 id="51ae90a0-f127-4348-9728-e149eb4cd6c2" data-toc-id="51ae90a0-f127-4348-9728-e149eb4cd6c2" style="font-size: 24px; line-height: 1.2;">What Grade 5 Harmonisation Adds</h2>Grade 5 harmonisation is built on everything from Grade 4, but the scope widens in four significant ways.1. Longer harmonic passages Grade 5 passages are longer and more harmonically complex. Students must sustain consistent voice-leading across more bars without losing track of the rules that apply throughout.2. Pianoforte-style cadence harmonisation At Grade 5, a new question type appears: harmonising cadences where the exam question specifies whether to write in pianoforte style or four-part vocal style. The question tells you which — using the wrong style loses marks.In pianoforte style, a single bass note sits alone in the left hand and the chord is written in the right hand (generally three notes). If a melody note is already given in the treble, the added chord notes go below it — not above. This layout differs from four-part vocal style where the notes are distributed across four separate voices within strict range limits. This applies specifically to cadence writing; full passage harmonisation at Grade 5 remains in four-part vocal style.3. Modulation within the passage At Grade 5, harmonisation passages modulate — they move through related keys. A student must recognise when the harmony has shifted and select chords appropriate to the new key, including at cadence points. Failing to recognise modulation and continuing to harmonise in the original key produces a string of errors.4. New chords and non-harmony notes Grade 5 introduces chords that do not appear at Grade 4:<ul><li>IIb (Neapolitan sixth) — a first inversion chord built on the flattened second degree; used approaching cadences in minor keys especially</li><li>VIIb — first inversion chord on the leading note; a specific voice-leading context applies</li><li>Ic (second inversion tonic) — used almost exclusively in the cadential Ic–V progression</li></ul>Passing notes and auxiliary notes — notes that fall between or around chord tones — are also added at Grade 5. Each must be correctly placed: approached and left by step, on weak beats.<hr><h2 id="7a919af8-7209-447c-93bc-b428bea619d8" data-toc-id="7a919af8-7209-447c-93bc-b428bea619d8" style="font-size: 24px; line-height: 1.2;">The Most Common Harmonisation Mistakes</h2><img src="https://ezycourse.b-cdn.net/2442/cmq0b5bs1ctzi44p9cj792y2u.png" alt="image" containerstyle="width: 100%; height: auto; cursor: pointer; " wrapperstyle="display: flex">These are the errors that appear most frequently in AMEB Grade 4 and 5 harmonisation:Parallel fifths and octaves The most penalised error in four-part writing. Students often produce parallels between bass and tenor — voices that are written last and checked least carefully. The fix: after completing the passage, go back and check every pair of adjacent voices, bar by bar.Doubling the leading note The leading note (seventh scale degree) has a strong tendency to resolve upward to the tonic. If it appears in two voices and both try to resolve, parallel octaves result. Never double the leading note in chord V or VII.Wrong chord choice at cadence points Cadences must be correct. A passage that ends a phrase on the wrong chord, or uses a root position where first inversion is needed, loses marks specifically because cadence points are the moments examiners look at first. Identify all cadence positions before choosing any other chords.Missing the modulation (Grade 5) If a note appears that doesn’t belong to the original key — particularly a sharpened note in what was a minor passage — treat it as a signal to check whether the key has changed. Continuing to harmonise in the wrong key produces cascading errors.Unresolved Ic (Grade 5) The Ic chord must move to V. It is not a standalone chord — it is always part of a cadential Ic–V (or Ic–V–I) figure. Using Ic anywhere else, or leaving it unresolved, is an error specific to Grade 5.<hr><h2 id="f4f1ac74-896f-4d56-b262-5e2e7e55c057" data-toc-id="f4f1ac74-896f-4d56-b262-5e2e7e55c057" style="font-size: 24px; line-height: 1.2;">A Step-by-Step Approach That Works</h2>This is the sequence used in the MusoLearn Level 4 and 5 harmonisation lessons:Step 1: Identify the key. Confirm the key signature and check for any accidentals that suggest modulation. Write the key at the top of your working space.Step 2: Mark all cadence points. Phrase endings are where cadences fall. Mark them before choosing any other chords. Cadence chord selection is constrained — getting these right first anchors the rest of the passage.Step 3: Choose the remaining chords. Fill in the chords between cadences, aiming for variety and smooth bass movement. Prefer stepwise movement in the bass over large leaps.Step 4: Write the bass line. Once chord choices are confirmed, write the bass voice. Use first inversion chords where they produce a smoother bass line. Check the bass stays within range (E2–C4).Step 5: Fill the inner voices. Write alto and tenor last. Keep each voice within its range. Move by step where possible; avoid large leaps unless the chord requires them.Step 6: Check every voice pair for parallels. Go through the passage bar by bar and check soprano/alto, alto/tenor, and tenor/bass for parallel fifths and octaves. This step catches the most errors — do not skip it.<hr><h2 id="dde46159-4a16-40c0-9046-cdcf7aa8cebf" data-toc-id="dde46159-4a16-40c0-9046-cdcf7aa8cebf" style="font-size: 24px; line-height: 1.2;">How MusoLearn Teaches Harmonisation</h2>MusoLearn’s <a target="_blank" href="https://www.musolearn.com/en/course-detail/music-theory-level-4/6170/">Level 4</a> course devotes an entire chapter to harmonisation — three dedicated lessons covering first inversion triads in four-part harmony, harmonic extension, and a full worked harmonisation practice session with sample answers.<a target="_blank" href="https://www.musolearn.com/en/course-detail/music-theory-level-5/6171/">Level 5</a> extends this across four lessons: longer harmonic passages, piano-style writing, first inversion chords in cadential contexts, and harmonisation with modulation. Each lesson uses real AMEB-style exercises with worked sample answers.Both levels include auto-marked quizzes, printable worksheets, and direct teacher chat access for questions on specific exercises. Lessons are 3–7 minutes each — structured enough to build systematic habits, short enough to fit around instrument practice.Students can start with a 3-day free trial to work through the opening lessons and see whether the approach suits their study routine.<a target="_blank" rel="noopener noreferrer" href="https://www.musolearn.com">Start your 3-day free trial → musolearn.com</a><hr><h2 id="296bc9ea-024f-454f-b2b4-9c7951bf68f5" data-toc-id="296bc9ea-024f-454f-b2b4-9c7951bf68f5" style="font-size: 24px; line-height: 1.2;">Summary: AMEB Harmonisation in Five Points</h2><ol><li>Harmonisation begins at Grade 4 — it draws on everything learned at Grades 1–3, which must already be solid.</li><li>Four-part vocal rules are non-negotiable — parallel fifths, parallel octaves, doubled leading notes, and voice-crossing are all penalised.</li><li>Cadence identification comes first — mark phrase endings and choose cadence chords before filling in anything else.</li><li>Grade 5 adds modulation, pianoforte-style cadence harmonisation, and new chords — IIb, VIIb, Ic, non-harmony notes, and cadence writing in pianoforte style are all Grade 5 additions; none appear at Grade 4.</li><li>Always check every voice pair — parallel fifths are most common between bass and tenor; systematic checking after writing is not optional.</li></ol>MusoLearn is not affiliated with AMEB, ABRSM, or Trinity Guildhall.</article>

A step-by-step guide to AMEB music theory harmonisation for Grades 4 and 5 — what's required, the most common mistakes, and a practical approach that works.

AMEB Harmonisation: Grade 4 & 5 Complete Guide | MusoLearn

AMEB Music Theory Harmonisation: A Step-by-Step Guide for Grades 4 and 5

Why Harmonisation Is the Hardest Section in AMEB Theory

What Grade 4 Harmonisation Asks You to Do

Summary: AMEB Harmonisation in Five Points

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AMEB Music Theory Harmonisation: A Step-by-Step Guide for Grades 4 and 5

AMEB Music Theory Harmonisation: A Step-by-Step Guide for Grades 4 and 5

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