Fitz, K. and Haken, L. "Sinusoidal Modeling and Manipulation Using Lemur". Computer Music Journal, Vol. 20:4, pp. 44--59, Winter 1996.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....can become very audible after some transformation has been performed on the sound. This restricted spectral model is often called a sinusoidal model. Many sinusoidal models have been proposed in recent years, and have demonstrated their practical interest in software implementations like Lemur [FH96] and SMS [Ser97b] thanks to the always increasing power of nowadays computers. However, sinusoidal models are derived from the work of Jean Baptiste Fourier during the ninetieth century. Next section presents one of the most famous method used to extract model parameters from existing sounds. 3 ....

....Accurate short time spectral analysis is extremely important since it is the first step for a key technique called partial tracking. It consists in following the evolutions of power spectrum maxima in time. This technique is used in famous software packages like AudioSculpt [IRC96] Lemur [FH96] [MQ86] PARSHL [SS87] and SMS [SS90] So many of them suffer from the short time Fourier analysis limitations shown above. Next section introduces an original technique that greatly reduce these limitations. 4 FT : Fourier Transform using n Signal Derivatives Position, speed, but also ....

Kelly Fitz and Lippold Haken. Sinusoidal Modeling and Manipulation Using Lemur. Computer Music Journal, 20(4):44--59, 1996.

....are now represented in a spectral domain. As a consequence, filtering gets trivial: its is just a matter of multiplication among spectra once the spectral response of the filter is designed, which is quite easy to do. 2.2.2. Additive Synthesis The McAulay Quatieri analysis, implemented in Lemur [4], looks across short term spectra for partials. These partials are pseudo sinusoidal tracks for which amplitudes and frequencies evolve slowly with time. The audio signal # can be calculated from the additive parameters using equations: ##### # # ### # # ### ##### # #### (1) # # ##### # ###### ....

Kelly Fitz and Lippold Haken, "Sinusoidal Modeling and Manipulation Using Lemur," Computer Music Journal, vol. 20, no. 4, pp. 44--59, 1996.

....[29] and then reduces it to a series of harmonic partials. The result uses the same format as .pv.an files, but has the suffix .mq.an by convention. 3.2 Lemur (Kelly Fitz, et al.) Another group at UIUC under Dr. Lippold Haken has released a sinusoidal analysis synthesis package called Lemur [30, 31]. Lemur is based on Maher s and Beauchamp s extension of the McAulay Quatieri algorithm [32] Lemur uses its own data file format to represent analysis results [33] The file header gives the length and sampling rate of the analyzed file, the FFT size, parameters of the analysis window, and other ....

K. Fitz and L. Haken, "Sinusoidal modeling and manipulation using Lemur," Computer Music Journal, vol. 20, num. 4, pp. 44-59, 1996.

....oscillator is distorted as its frequency goes from bin to bin, due to the shape of the analysis window mainlobe. 5 Results on Natural Sounds The short time Fourier analysis is present in the very first step of many spectral analysis methods like the McAulay Quatieri analysis [4] used in Lemur [5] and Spectral Modeling Synthesis (SMS) 1] When no precautions are taken, the imprecisions pointed out in the previous section appear. The FT n analysis method has been implemented as a part of a sound analysis software package running on different platforms, called InSpect [9] This program ....

Kelly Fitz and Lippold Haken. 1996. "Sinusoidal Modeling and Manipulation Using Lemur". Computer Music Journal, Volume 20, Number 4, pp. 44-59.

....Editing Regions Spectrogram Graphic Editing Palette 35 Figure 4: A typical AudioSculpt session In fig. 4, some portions of the spectrogram have been delimited and different magnitude reductions have been applied to them. Other applications, such as Lemur 17 , running on Apple Macintoshes) [7] or Ceres (developed at NoTam 18 ) perform different sets of operations such as partial tracking and tracing, logical and algorithmic editing, timbre morphing, etc. The contemporary sound designer can also benefit from tools which are specifically designed to transform sound objects in a ....

K. Fitz and L. Haken. Sinusoidal modeling and manipulation using lemur. Computer Music J., 20(4):44--59, 1997.

....of this introduction, and will continue to play a major role throughout the remainder of this thesis. 33 Chapter 2 Sinusoidal Modeling The sinusoidal model has been widely applied to speech coding and processing [57, 93, 94, 95, 96, 97, 98, 99] and audio analysis modification synthesis [36, 100, 101, 102, 103, 104, 105]. This chapter discusses the sinusoidal model, including analysis and synthesis techniques, reconstruction artifacts, and modification capabilities enabled by the parametric nature of the model. Time domain and frequency domain synthesis methods are examined. A thorough review of the short time ....

....fundamental common points, but also have substantial but sometimes subtle differences. For the sake of simplicity, this treatment adheres primarily to the approaches presented in the early literature on sinusoidal modeling [57, 36] and not on the many variations that have since been proposed [103, 97, 98]; comments on some other techniques such as [101, 107] are indeed included, but these inclusions are limited to techniques that are directly concerned with the modeling issues at hand. It should be noted that the issues to be discussed herein apply to sinusoidal modeling in general; their ....

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K. Fitz and L. Haken, "Sinusoidal modeling and manipulation using Lemur," Computer Music Journal, vol. 20, pp. 44--59, Winter 1996.

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Kelly Fitz and Lippold Haken, "Sinusoidal modeling and manipulation using Lemur," Computer Music Journal, vol. 20, no. 4, pp. 44 -- 59, 1996.

....to make them more readable [1] to measure sinusoidality, and to ensure optimal window alignment in analysis of musical signals [2] We use reassignment to improve our bandwidthenhanced additive modeling representation. Our representation is similar in spirit to traditional sinusoidal models [3, 4, 5] in that a waveform is modeled as a collection of components, called partials, having time varying amplitude and frequency envelopes. Our partials are not strictly sinusoidal, however. We employ a technique of Bandwidth Enhancement to combine sinusoidal energy and noise energy into a single ....

Kelly Fitz and Lippold Haken, "Sinusoidal modeling and manipulation using Lemur," Computer Music Journal,vol. 20, no. 4, pp. 44 -- 59, 1996.

....derived from purely sinusoidal analyses, sounds are described by a collection of sinusoidal components called partials. Sinusoidal partials are defined by time varying amplitude and frequency envelopes formed by linking spectral energy peaks extracted from short time Fourier spectra [1, 2, 3]. For sounds that are locally nearly periodic, having very highly concentrated shorttime spectral energy, a perceptually complete representation can be constructed using sinusoidal methods. Signals with significant noise energy are problematic for sinusoidal models. The conditions established by ....

Kelly Fitz and Lippold Haken, "Sinusoidal modeling and manipulation using Lemur," Computer Music Journal,vol. 20, no. 4, pp. 44 -- 59, 1996.

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Fitz, K. and Haken, L. "Sinusoidal Modeling and Manipulation Using Lemur". Computer Music Journal, Vol. 20:4, pp. 44--59, Winter 1996.

No context found.

Kelly Fitz and Lippold Haken, "Sinusoidal Modeling and Manipulation Using Lemur," Computer Music Journal, vol. 20, no. 4, pp. 44--59, Winter 1996.

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