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Song-level multi-pitch tracking by heavily constrained clustering

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3 Author(s)
Zhiyao Duan ; Dept. of Electr. Eng. & Comput. Sci., Northwestern Univ., Evanston, IL, USA ; Jinyu Han ; Pardo, B.

Given a set of monophonic, harmonic sound sources (e.g. human voices or wind instruments), multi-pitch estimation (MPE) is the task of determining the instantaneous pitches of each source. Multi-pitch tracking (MPT) connects the instantaneous pitch estimates provided by MPE algorithms into pitch trajectories of sources. A trajectory can be short (within a musical note), or long (an entire piece of music). While note-level MPT methods usually utilize local time-frequency proximity of pitches to connect them into a note, song-level MPT is much more difficult and needs more information. This is because pitches evolve discontinuously from note to note, and pitch trajectories can even interweave. In this paper, we cast the song-level MPT problem as a constrained clustering problem. The constraints are time-frequency locality of pitches and the clustering objective is their timbre consistency. Due to this problem's unique properties, existing constrained clustering algorithms cannot be directly applied. We propose a new constrained clustering algorithm. Experiments show that our approach produces good results on real-world music recordings of 4 musical instruments.

Published in:

Acoustics Speech and Signal Processing (ICASSP), 2010 IEEE International Conference on

Date of Conference:

14-19 March 2010

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