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Using Stereo Information for Instrument Identification in Polyphonic Mixtures

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3 Author(s)
Sodoyer, D. ; University Pierre et Marie Curie - Paris 6, Institut Jean Le Rond D''Alembert, LAM team, 11, rue de Lourmel, 75015 Paris, France. DavidSodoyer@lam.jussieu.fr ; Leveau, P. ; Daudet, L.

This paper discusses the localization of music instruments in the stereo space. The signal, composed of two channels, is decomposed into a linear combination of Stereo Instrument-Specific Harmonic atoms, that model the harmonic structure of instrument notes as a whole and whose individual angles give clues about the real angle of the sources. To get such decompositions, a Stereo Matching Pursuit algorithm has been implemented, with a phase adaptation for each signal channel. This decomposition gives neat source localizations for instantaneous mixes, and the extension to realistic convolutive mixes seems possible with adequate post-processing.

Published in:

Applications of Signal Processing to Audio and Acoustics, 2007 IEEE Workshop on

Date of Conference:

21-24 Oct. 2007

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