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      Harmony and tonality in film music

      Lesson details

      Learning outcome

      I can explain how harmony and tonality help shape films and have reharmonised a melody.

      Key learning points

      1. Harmony and tonality have a significant impact on the mood of film music.
      2. Composers use atonal, diatonic (major or minor) or modal tonality to create different moods.
      3. The choice of chords and use of chromatic harmony are also important for creating the correct emotions for the scene.
      4. Reharmonising a melody, by changing the harmony, is an effective way to develop a melodic idea in a film.

      Keywords

      • Tonality - the set of notes that a piece is based on (e.g. major, minor, atonal)

      • Diatonic - music that uses only notes from within a key

      • Chromatic - music that uses some notes from outside of the key

      • Modal - music based on a mode, a type of scale different from major and minor scales

      • Reharmonisation - when a composer keeps a melody the same but changes the harmony

      Common misconception

      Chromatic and atonal are the same thing.

      Atonal music sounds chromatic, because there is no clear tonal centre. However, chromatic music isn't necessarily atonal - a piece can be in a key, but use chromatic notes from outside of it.

      Teacher tip

      Encourage confident pupils to explore their reharmonisation of the melody using extended chords. They should experiment creating their own 4- or 5-note chords to reharmonise the melody with more complexity.

      Equipment

      DAW, notation software, keyboard or other suitable instrument as a composition tool

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      A leitmotif is a __________.

      Correct answer: short recurring theme linked to a character, place, or idea
      random tune used once
      type of rhythm pattern
      specific chord progression

      Q2.
      Which of these is not a role of film music?

      to build tension
      to tell us about characters
      Correct answer: to improve picture quality
      to establish mood

      Q3.
      __________ transformation is when a leitmotif is developed to match story changes.

      Dynamic
      Correct answer: Motivic
      Rhythmic
      Harmonic

      Q4.
      Which type of tonality would best suit a sad or tragic scene?

      atonal
      major
      modal
      Correct answer: minor

      Q5.
      Which type of rhythm would best suit an energetic, action-filled scene?

      Correct answer: fast and lively
      slow and calm
      random and free
      long and sustained

      Q6.
      Identify with a single word why early films did not have recorded music before the late 1920s?

      Correct Answer: technology

      6 Questions

      Q1.
      Which of these is not a type of tonality?

      major
      minor
      modal
      Correct answer: chromatic

      Q2.
      Chromatic harmony is using notes outside the .

      Correct Answer: key

      Q3.
      Which mood would best suit chromatic harmony?

      calmness
      joy
      Correct answer: mystery or unease
      celebration

      Q4.
      __________ is when the melody stays the same, but the harmony changes underneath.

      Extension
      Modulation
      Variation
      Correct answer: Reharmonisation

      Q5.
      Why might a film composer reharmonise a melody?

      Correct answer: To match the mood of a new scene.
      To delete the melody completely.
      Correct answer: To create contrast and surprise.
      To confuse the audience.

      Q6.
      Which chords help make the new key very clear and obvious?

      Correct Answer: primary, tonic, dominant, subdominant

      To help you plan your 10 music lesson on: Harmony and tonality in film music, download all teaching resources for free and adapt to suit your pupils' needs...