Elements

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Across
  1. 2. A tune or main theme(6 letters)
  2. 3. The speed of the music (5 letters)
  3. 5. The 'colour' or quality of a sound (6 letters)
  4. 6. How loud or soft the music is (8 letters)
Down
  1. 1. Layers of sound in music (7 letters)
  2. 4. Highness or lowness of a sound (5 letters)