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In this paper we propose a new method to reduce phase vocoder artifacts during attack transients. In contrast to all transient preservation algorithms that have been proposed up to now the new approach does not impose any constraints on the time dilation parameter for processing transient segments. By means of an investigation into the spectral properties(More)
In this paper we propose a new method to reduce phase vocoder artifacts during attack transients. In contrast to all existing algorithms the new approach is not based on fixing the time dilation parameter to one during transient segments and works locally in frequency such that stationary parts of the signal will not be affected. For transient detection we(More)
We present a computational model of musical instrument sounds that focuses on capturing the dynamic behavior of the spectral envelope. A set of spectro-temporal envelopes belonging to different notes of each instrument are extracted by means of sinusoidal modeling and subsequent frequency interpolation, before being subjected to principal component(More)
This paper presents a frame-based system for estimating multiple fundamental frequencies (F0s) of polyphonic music signals based on the short-time Fourier transform (STFT) representation. To estimate the number of sources along with their F0s, it is proposed to estimate the noise level beforehand and then jointly evaluate all the possible combinations among(More)
This article reports on developments conducted in the framework of the SampleOrchestrator project. We assembled for this project a set of tools allowing for the interactive real-time synthesis of automatically analysed and annotated audio files. Rather than a specific technique we present a set of components that support a variety of different interactive(More)
This article is concerned with the estimation of fundamental frequencies, or F0s, in polyphonic music. We propose a new method for jointly evaluating multiple F0 hypotheses based on three physical principles: harmonicity, spectral smoothness and synchronous amplitude evolution within a single source. Based on the generative quasiharmonic model, a set of(More)
In this work, we investigate spectral envelope estimation for harmonic signals. We address the issue of model order selection and propose to make use of the fact that the spectral envelope is sampled by means of the harmonic structure of the signal in order to derive upper bounds for the estimator order. An experimental study is performed using synthetic(More)
In glottal source analysis, the phase minimization criterion has already been proposed to detect excitation instants. As shown in this paper, this criterion can also be used to estimate the shape parameter of a glottal model (ex. Liljencrants-Fant model) and not only its time position. Additionally, we show that the shape parameter can be estimated(More)
In current methods for voice transformation and speech synthesis, the vocal tract filter is usually assumed to be excited by a flat amplitude spectrum. In this article, we present a method using a mixed source model defined as a mixture of the Liljencrants–Fant (LF) model and Gaussian noise. Using the LF model, the base approach used in this presented work(More)