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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 - PowerPoint PPT Presentation
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Foundations of Computing
Lecture # 24Sound Editing: Making SoundsSound Editing and Processingwith AudacityEdit Sound DemoBoost BaseChange PitchChange TempoChange Speed
Making Noise :-)Manufacturing soundsExplosions
Power voice
Speed racerExplosion AlgorithmAdd New Audio TrackGenerate White NoiseBoost Base (All the way)Ad Reverb (Gverb)ShapeCopy and PasteMoveMix and RenderExplosionsGenerate some noise
ExplosionsBoost the base
ExplosionsAdd some reverb
ExplosionsCreate an Envelope to shape the volume
ExplosionsAmplify the front end
Power Voice AlgorithmRecord VoiceTrimDecrease PitchAmplifyBass BoostReverb/EchoPower VoiceRecord some words
Power VoiceTrim off noise at the ends
Power VoiceLower the pitch
Power VoiceAdd Reverb/Echo
Motorbike AlgorithmNew Audio TrackGenerate sawtooth tone at 320 Hz (1 sec)New Audio Track sawtooth tone at 520 Hz (1 sec)Mix and RenderNew Audio TrackPink NoiseMix and RenderSplit into two piecesLower Pitch Going AwayShape/Fade in, Fade outMix and RenderSpeed RacerGenerate a chord
+
Mix and Render
Speed RacerGenerate Pink Noise
Mix and Render with 340 Hz + 520 Hz chord
Speed RacerDo approach - depart with an envelope
Speed RacerLower pitch for going away
Sound ReviewRecording sound: Store an array of amplitudes (voltage measurements)Sampling FrequencyQuantizationDynamic RangeMIDI (object representation)Pitch, delay, duration, timbreSynthesizing an instrumentAttack, dwell, sustain, releaseSpeech RecognitionConverting an audio signal into text
Problems: I want to
to?two?too?
Speech Recognition - problemsDiversity of speechI want a cookieI want a cookieI want a cookie
Speech Recognition - problemsDiversity of speechI want a cookieI want a cookieI want a cookieConfused recognitionI want to flyEye want to cry
Speech Recognition - successSmall number of wordsabout 1000
Clear differences among words
Train recognizer to specific persons voiceSpeech synthesisConverting text into sound
Concatenation of soundWords go together funny
Prosody, the inflection that you speak withVariation changes meaningThat is yours That is yours
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