character: Professor Pitch
topic: Understanding Frequency and Amplitude
grade: 9
subject: Music
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character: Melody Maker
topic: The Role of Frequency in Music
grade: 9
subject: Music
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character: Rhythm Ruler
topic: Amplitude and Sound Volume
grade: 9
subject: Music
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character: Harmony Guide
topic: Exploring Waveforms and Their Properties
grade: 9
subject: Music
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