Department of Computer Science - Institute of Mathematics and Statistics - University of São Paulo - Brazil
Languages
Past talks
Speaker: Gilmar Rocha de Oliveira Dias
Date and time: Monday, June 11, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
Date and time: Monday, June 11, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
In these DAFx talks, the main concepts in the field of audio effects processing will be presented. In the 11th seminar of the series, the interesting audio effects that can be obtained by warping the time and/or frequency axis of an audio signal will be described. Time warping aims at deforming the waveform or the envelope of the signal, while frequency warping modifies its spectral content by transforming a harmonic signal into an inharmonic one and vice versa. The effects obtained by warping often increase the richness of the signal by introducing detuning or fluctuation of the waveform. In this talk, we'll see that time and frequency warping give rise to a tremendous amount of possibilities still unexplored from a musical point of view.
Speaker: Danilo J. S. Bellini
Date and time: Monday, June 4, 2012 - 12:00
Place: Sala 267-A at IME/USP
Abstract:
Date and time: Monday, June 4, 2012 - 12:00
Place: Sala 267-A at IME/USP
Abstract:
In these talks, the main concepts in the field of audio effects processing will be presented. In this seminar, frequency domain processing and representation audio models will be described, as well as issues derived from spectral model gathering. Among topics that'll be covered, the presentation count up the STFT, the signal representation as partials plus noise, the fundamental frequency, harmonic partials and residual detection, the residual modeling, and the description of some possible effects derived from covered models, like pitch transposition with timbre preservation, vibrato, and gender (male/female) voice change.
Speaker: Marcelo Queiroz
Date and time: Monday, May 28, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
Date and time: Monday, May 28, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
In this talk we will introduce the notion of adaptive effects, i.e. sound processing methods whose internal configuration is adaptive to temporal context. This adaptation may be due to automatic control of effect parameters through features extracted from the input signal, or through dynamic reconfigurations of processing chains. Some examples of adaptive effects are dynamic compression, auto-tuning, morphing and concatenative synthesis.
Speaker: Antonio Deusany de Carvalho Junior
Date and time: Monday, May 21, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
Date and time: Monday, May 21, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
In these DAFx talks, the main concepts in the field of audio effects processing will be presented. In this seminar, we will present techniques to estimate the spectral envelope and perform the source-filter separation, and sound-filter combination. There are three techniques which can be used for these steps: Channel Vocoder, Linear Prediction, and Cepstrum. Initially we will describe the fundamentals of each technique. Next we will introduce some basic transformations.
Speaker: André Jucovsky Bianchi
Date and time: Monday, May 14, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
Date and time: Monday, May 14, 2012 - 12:00
Place: Room 267-A, at IME/USP
Abstract:
In these DAFx talks, the main concepts in the field of audio effects processing will be presented. In this seminar, we will initially present some basic concepts for time-frequency processing and some implementation models (filter-bank, FFT analysis, IFFT and sine sum resynthesis and gaboret sum). Next, we will see some audio effects that can be produced as filtering, dispersion, time-stretching, pitch-shifting, stable/transient component separation, mutation of sounds, robotization, whisperization, denoising and spectral panning.
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