EvolvingMusicalCounterpointPresentation

EvolvingMusicalCounterpointPresentation - Evolving Musical...

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Evolving Musical Counterpoint Jeffrey Power Jacobs James Reggia University of Maryland
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2 Introduction The Chronopoint Musical Evolution System Genetic Algorithm Subjective Fitness Evaluation Compositional Tool Educational Tool
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3 What is Counterpoint? Compositional Technique Layering of two or more melodies Canon (14 th century) “Leader” and “follower” melodies written contrapuntally Fugue (16 th century) Multiple imitative melodies built on overarching “theme”
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4 Why a GA? Brute force method (generating strings of random notes) grossly inefficient Melodic/rhythmic dissonance Doesn’t take user’s preferences into account Why not hill climbing? (start with arbitrary solution, incrementally make small changes) User impatience, takes very long to see improvement Limits diversity of melodies
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5 GA Process Overview Seed Melody Initial Population Generation Subjective Fitness Evaluation Finish & Export Final Melody
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6 Seed Melody Bach’s “Crab Canon” (first 8 bars)
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7 Seed Melody Audio Demo
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EvolvingMusicalCounterpointPresentation - Evolving Musical...

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