Alternative analysis-synthesis approaches for timescale, frequency and other transformations of musical signals


Lazzarini, Victor and Timoney, Joseph and Lysaght, Thomas (2005) Alternative analysis-synthesis approaches for timescale, frequency and other transformations of musical signals. In: DAFX-05 the 8th Int. Conference on Digital Audio Effects, September 20-22 2005, Madrid, Spain.

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Abstract

This article presents new spectral analysis-synthesis approaches to musical signal transformation. The analysis methods presented here involve the use of a superior quality technique of frequency estimation, the Instantaneous Frequency Distribution (IFD), and partial tracking. We discuss the theory behind the IFD, comparing it to other existing methods. The partial tracking analysis employed in this process is explained fully. This is followed by a look into the three resynthesis methods proposed by this work, based on different approaches to additive synthesis. A number of transformations of musical signals are proposed to take advantage of the analysis-synthesis techniques. Performance details and specific aspects of this implementation are discussed. This is complemented by a look at some of the results of these methods in the time-stretching of audio signals, where they will be shown to perform better than many of the currently available techniques.

Item Type: Conference or Workshop Item (Paper)
Keywords: Instantaneous Frequency Distribution; Partial Tracking; Audio analysis/synthesis; time scale modification;
Academic Unit: Faculty of Arts,Celtic Studies and Philosophy > Music
Faculty of Science and Engineering > Computer Science
Item ID: 4196
Depositing User: Joseph Timoney
Date Deposited: 20 Feb 2013 10:14
Refereed: Yes
URI:

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