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Lecture # 24 Sound Editing: Making Sounds

Lecture # 24 Sound Editing: Making Sounds. Sound Editing and Processing with Audacity. Edit Sound Demo. Boost Base Change Pitch Change Tempo Change Speed. Making Noise :-). Manufacturing sounds. Explosions “ Power voice ” Speed racer. Explosion Algorithm. Add New Audio Track

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Lecture # 24 Sound Editing: Making Sounds

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  1. Lecture # 24 Sound Editing: Making Sounds

  2. Sound Editing and Processingwith Audacity

  3. Edit Sound Demo • Boost Base • Change Pitch • Change Tempo • Change Speed

  4. Making Noise :-)

  5. Manufacturing sounds • Explosions • “Power voice” • Speed racer

  6. Explosion Algorithm • Add New Audio Track • Generate White Noise • Boost Base (All the way) • Ad Reverb (Gverb) • Shape • Copy and Paste • Move • Mix and Render

  7. Explosions • Generate some noise

  8. Explosions • Boost the base

  9. Explosions • Add some reverb

  10. Explosions • Create an Envelope to shape the volume

  11. Explosions • Amplify the front end

  12. Power Voice Algorithm • Record Voice • Trim • Decrease Pitch • Amplify • Bass Boost • Reverb/Echo

  13. Power Voice • Record some words

  14. Power Voice • Trim off noise at the ends

  15. Power Voice • Lower the pitch

  16. Power Voice • Add Reverb/Echo

  17. Motorbike Algorithm • New Audio Track • Generate sawtooth tone at 320 Hz (1 sec) • New Audio Track sawtooth tone at 520 Hz (1 sec) • Mix and Render • New Audio Track • Pink Noise • Mix and Render • Split into two pieces • Lower Pitch Going Away • Shape/Fade in, Fade out • Mix and Render

  18. Speed Racer • Generate a chord + Mix and Render

  19. Speed Racer • Generate Pink Noise • Mix and Render with 340 Hz + 520 Hz chord

  20. Speed Racer • Do approach - depart with an envelope

  21. Speed Racer • Lower pitch for going away

  22. Sound Review • Recording sound: • Store an array of amplitudes (voltage measurements) • Sampling Frequency • Quantization • Dynamic Range • MIDI (object representation) • Pitch, delay, duration, timbre • Synthesizing an instrument • Attack, dwell, sustain, release

  23. Speech Recognition • Converting an audio signal into text • Problems: “I want to” • to? • two? • too?

  24. Speech Recognition - problems • Diversity of speech • I want a cookie • I want a cookie • I want a cookie

  25. Speech Recognition - problems • Diversity of speech • I want a cookie • I want a cookie • I want a cookie • Confused recognition • I want to fly • Eye want to cry

  26. Speech Recognition - success • Small number of words • about 1000 • Clear differences among words • Train recognizer to specific person’s voice

  27. Speech synthesis • Converting text into sound • Concatenation of sound • Words go together funny • Prosody, the inflection that you speak with • Variation changes meaning • That is yours • That is yours

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