Download Sound Modeling from the Analysis of Real Sounds This work addresses sound modeling using a combination of physical and signal models with a particular emphasis on the flute sound. For that purpose, analysis methods adapted to the nonstationary nature of sounds are developed. Further on parameters characterizing the sound from a perceptive and a physical point of view are extracted. The synthesis process is then designed to reproduce a perceptive effect and to simulate the physical behavior of the sound generating system. The correspondence between analysis and synthesis parameters is crucial and can be achieved using both mathematical and perceptive criteria. Real-time control of such models makes it possible to use specially designed interfaces mirroring already existing sound generators like traditional musical instruments.
Download A Proposal for using SMS for Expression Modeling Spectral models have proven to be a successful method for analyzing and re-synthesizing natural and acoustic sounds, to the extent that a musical phrase can also be modeled in order to extract performance parameters. This paper suggests various parameters which are embedded in the spectral analysis or .sms file and proposes some methods which can be used for expression modeling based upon compositional, perceptive, and cognition approaches. The focus is on achieving the means to construct a translation algorithm which the composer can use as a tool to analyze expressive material such as a musical phrase or a spoken sentence of text, and apply detected parameters to the vectors of a physical model or a synthesis algorithm..
Download Toward the Perfect Audio Morph? Singing Voice Synthesis and Processing This paper reviews the popular methods and models used for the synthesis of the singing voice, discussing strengths and weaknesses of each technique. Then a brief review is given of research on cross-modal visual/auditory perception of the human voice. The paper concludes with comments related to the singing synthesis systems discussed, addressing multi-modal perception, audio morphing, and the categorical perception of sound.
Download Generalizing the Reflection Model by the Use of a Particle Tracing Method Splitting the reflection phenomenon in a specular and a dioeuse one, current acoustic quality prediction methods can't deal with real materials. In this paper, we describe the implementation of a particle tracing method that can deal with a general model of reflection, the bidirectional reflectance distribution function. Furthermore, being based on the Monte-Carlo methods, this method is not sensitive to combinatorial explosion. The flexibility of the particle tracing method make it a good test bed for comparisons and evaluations of source or reflection models.
Download VowSynth: A Synthesizer of Vowel Sounds Based on Additive Synthesis This article presents the design and implementation of a non real-time voice synthesizer based on the analysis of a soprano voice singing the five spanish vowels. The analysis is based on the SMS technique and the synthesis uses additive synthesis.
Download Fractionally-addressed Delay Lines While traditional implementations of digital delay lines are based on a circular buffer accessed by two pointers, we propose an implementation where a single fractional pointer is used both for reading and writing operations. On modern general-purpose architectures, the proposed method is nearly as efficient as the popular interpolated circular buffer, but it offers better performance in terms of frequency-dependent attenuation and response to delay-length modulations.
Download Dispersive and Pitch-Synchronous Processing of Sounds The aim of this paper is to present results on digital processing of sounds by means of both dispersive delay lines and pitch-synchronous transforms in a unified framework. The background on frequency warping is detailed and applications of this technique are pointed out with reference to the existing literature. These include transient extraction, pitch shifting, harmonic detuning and auditory modeling.
Download Musical Gestures and Audio Effects Processing We introduce the notion of musical gestures as time varying measurements which identify the audio input stream’s musical skeleton without attempting to implement any involved model of musical understanding. Living comfortably at an intermediate level of abstraction between wave forms and music transcriptions, these musical gestures are used to control the behavior of an audio processing module. The resulting scheme qualifies as an audio effects processing system as it essentially transforms an audio stream into another.
Download Sound Generation with Aperiodic Ordered Systems Aperiodic 1D systems introduced in physics in the field of quasicrystals are used in this work, in order to generate selfsimilar aperiodic time structures. The Fourier analysis of series of impulses distributed in time in a non periodic but ordered way, shows that for some cases the spectrum has a discrete part that can be used for sound synthesis.
Download FX8010 - A DSP Chip Architecture for Audio Effects FX8010 is a DSP chip architecture specifically designed for time-domain 3D audio and effects processing. It is a 32-channel, 32-bit integer design that can deliver 100MIPS at a 50KHZ audio sample rate. It features powerful delay memory and I/O engines that execute in parallel with and are decoupled from microprogram execution. Its highly regular architecture supports the simultaneous execution of large numbers of separately compiled and downloaded programs with zero-overhead signal patching. A compiler for FX8010 programs generates code from C-style expressions and control-flow constructs. FX8010 has been implemented in two different ASICs for PC multimedia and professional audio applications.