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    Improving Polyphonic and Poly-Instrumental Music to Score Alignment

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    Date
    2003-10-26
    Author
    Ferréol Soulez
    Xavier Rodet
    Diemo Schwarz
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    Abstract
    Music alignment link events in a score and points on the audio performance time axis. All the parts of a recording can be thus indexed according to score information. The automatic alignment presented in this paper is based on a dynamic time warping methodology. Local distances are computed using the signal's spectral features through an attack plus sustain note modeling. Good alignment has been obtained for polyphony of up to five instruments. The method is robust for difficulties such as trills, vibratos and fast sequences. It provides an accurate indicator giving position of score interpretation errors and extra or forgotten notes. Implementation optimizations allow aligning long sound files in a relatively short time. Evaluation results have been obtained on piano jazz recordings.
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    http://jhir.library.jhu.edu/handle/1774.2/21
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