Low-Latency Instrument Separation in Polyphonic Audio Using Timbre Models

  • Ricard Marxer
  • Jordi Janer
  • Jordi Bonada
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7191)

Abstract

This research focuses on the removal of the singing voice in polyphonic audio recordings under real-time constraints. It is based on time-frequency binary masks resulting from the combination of azimuth, phase difference and absolute frequency spectral bin classification and harmonic-derived masks. For the harmonic-derived masks, a pitch likelihood estimation technique based on Tikhonov regularization is proposed. A method for target instrument pitch tracking makes use of supervised timbre models. This approach runs in real-time on off-the-shelf computers with latency below 250ms. The method was compared to a state of the art Non-negative Matrix Factorization (NMF) offline technique and to the ideal binary mask separation. For the evaluation we used a dataset of multi-track versions of professional audio recordings.

Keywords

Source separation Singing voice Predominant pitch tracking 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Ricard Marxer
    • 1
  • Jordi Janer
    • 1
  • Jordi Bonada
    • 1
  1. 1.Music Technology GroupUniversitat Pompeu FabraBarcelonaSpain

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