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IB Diploma Music SL · Experimenting with Music
Mini-Lesson

Experimenting with music

Experimenting with music is where you connect theory to practice. As researcher, creator and performer you experiment with musical material and evidence it in a report. This lesson builds the harmony and form knowledge you experiment with.

research create perform experiment, then reflect

Work through each screen, answer the questions and mini-games as you go, and collect ⭐ stars. Press Start when you are ready.

What experimenting means

Deliberate trial and reflection

You take stimuli from the areas of inquiry and experiment: trying out ideas through creating (composing, arranging, improvising) and performing.

  • The internal assessment is a report evidencing research and experimentation through creating and performing tasks.
  • Experimentation means deliberate trial: change one element, notice the effect, reflect.
  • Keep evidence of the process, not only the finished product.
Harmony

Building chords (triads)

A triad is three notes stacked in thirds: root, third and fifth.

  • A major triad (C, E, G) sounds bright; a minor triad (A, C, E) sounds darker.
  • Chords are numbered by scale degree with Roman numerals: I (tonic), IV (subdominant) and V (dominant) are the primary chords.
  • In C major: I is C, IV is F, V is G, and vi is A minor.
Quick check

Name that cadence

?A phrase ends on chord V and sounds unfinished, like a question. Which cadence is it?
Harmony

Cadences — musical punctuation

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

  • Perfect cadence: V to I — sounds finished (a full stop).
  • Plagal cadence: IV to I — the Amen cadence, gently conclusive.
  • Imperfect cadence: any chord to V — sounds unfinished (a comma).
  • Interrupted cadence: V to vi — a surprise, where you expect I but get vi.
Perfect cadence = V → Ithe strongest way to close a phrase
Sort it

Research, create or perform?

Tap an experimenting task, then the role it mostly belongs to.

🔍 Researching

✍️ Creating

🎵 Performing

Tonality

Keys, modulation and chromaticism

  • Tonality is the key system: major (bright) or minor (dark), or modal or atonal.
  • Modulation is changing key within a piece for contrast or direction (often moving to the dominant key).
  • Diatonic notes belong to the key; chromatic notes come from outside it and add colour or tension.
Quick check

Name that form

?A pop song alternates a repeating catchy section with changing narrative sections. What is this structure?
Form

Structure — how sections are ordered

  • Binary (AB), ternary (ABA), rondo (ABACA).
  • Theme and variations — a theme returns transformed.
  • Strophic (same music each verse) versus through-composed (new music throughout).
  • 12-bar blues — a repeating twelve-bar chord pattern built on I, IV and V.
  • Verse–chorus — the backbone of most pop songs.
Experimenting with material

Concrete experiments to evidence

  • Take a motif and vary it (invert, augment, change its rhythm).
  • Reharmonise a melody with different chords and cadences.
  • Change the texture (turn a solo tune into a polyphonic round).
  • Change metre or feel (straight to swung; duple to compound).
  • Layer an ostinato or loop and build over it.

Document what you changed and how it sounded — that is the evidence assessors want.

Quick check

Blues chords

?The 12-bar blues is built mainly from which three chords?
Match it

Match the cadence to its chords

Tap a description on the left, then its matching term on the right.

Description
Term
Improvisation

Experimenting within an idiom

Experimenting often means improvising within a style’s rules — soloing over a 12-bar blues using the blues scale, or elaborating a raga in an alap.

Learn the idiom first (its scales, typical phrases and feel), then experiment within it and against it.

Quick check

Predict the effect

?You reharmonise a melody, swapping its perfect cadence for an interrupted one. What is the likely effect?
Skills

Evidencing the process

  • Show before and after: state your idea, what you tried, what happened, and what you changed next.
  • Use correct terms (cadence, modulation, ostinato, texture).
  • Connect experiments to the stimulus and the area of inquiry.
  • Reflection matters as much as the result.
Recap

The big ideas to know

Triads: root, third and fifth; primary chords I, IV and V

Cadences: perfect V–I, plagal IV–I, imperfect ?–V, interrupted V–vi

Tonality: major, minor, modal or atonal; modulation; diatonic versus chromatic

Forms: binary, ternary, rondo, variations, strophic, through-composed, 12-bar blues, verse–chorus

Method: experiment deliberately and evidence the process

You have covered Experimenting with music. Press Finish to see your score.

🏆

Mini-lesson complete!

⭐⭐⭐

You have connected theory to practice through the experimenting process. 🎉

Your stars: 0 / 0

Next: test yourself in the Evaluate stage, then lock it in with Verify.

📣 Smashed it? Share your score

Challenge a mate to beat your stars, or show a parent how you got on.

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