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Melody Generation by Phrase

Final Presentation Simon McNeilly Supervisors Dr. Lloyd Allison Jon McCormack. Melody Generation by Phrase. Outline. Why study the generation of music Methods for music generation Generating by a “phrase library” Results of this method Conclusions Questions. Why Music Generation.

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Melody Generation by Phrase

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  1. Final Presentation Simon McNeilly Supervisors Dr. Lloyd Allison Jon McCormack Melody Generation by Phrase

  2. Outline • Why study the generation of music • Methods for music generation • Generating by a “phrase library” • Results of this method • Conclusions • Questions

  3. Why Music Generation • It’s a challenge • Computer generated music becoming more popular

  4. Desired Qualities • Musical sound • Interesting • Sound similar to input music

  5. Methods for Generating Music • Composition games • Markov models • Grammars

  6. Generating Music by Phrase • Define a phrase as a sequence of music that is repeated and a bar or two in length • Generate a phrase at a time • Give high weights to repeating what has happened previously

  7. Music Generation Overview • Phrase library • Sequence of music • Time last played • Generate weightings • Select phrase

  8. Setting up the Phrase Library • Read in input music from a MIDI file • Look for repeating patterns • Choose some of the patterns found • Give each one an ID and a last played time

  9. Generation Process • Weight phrases and randomly select one • Play the selected phrase • Update library and history • Call generation function with updated history

  10. Phrase Weightings • Weighted average of different context lengths and time since last occurrence • Higher weightings for longer context lengths • Weight by appearances in a given context

  11. What It Sounds Like • Somewhat pleasant but boring • Can recognise the phrases used • Doesn’t really “go anywhere”

  12. Conclusion • System lacks ability to generate new interesting music • Mainly because it isn’t do anything large scale • Extensions to vary sound of phrases may also help

  13. Conclusion • Music produced retains aspects style from original • Preserves some harmony from original music • Will preserve rhythmic interest • Music is “pleasant”

  14. Possible Extensions • Add repeating from history, possibly with some variation • Give each phrase probabilities for belonging to chords, and use weightings on chord transitions • Generate new phrases to use

  15. That’s It • Any questions?

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