Lesson path IX
How Sound Works
Waves, overtones, and why twelve notes.
Unit 28 · sound
Sound Itself
Overtones, timbre, and why intervals clash.
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28.1
The harmonic series
One string, many pitches. Every note is a chord in disguise.
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28.2
Same note, different voice
Why piano and marimba disagree about C. Watch the wave.
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28.3
Rough or smooth
Consonance, dissonance, and the beating you can hear.
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28.4
Why twelve notes?
Climb twelve fifths and you almost land home. Equal temperament splits the difference.
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Practice this unit:Tuner ⚒
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