Sparse representations of polyphonic music

  title={Sparse representations of polyphonic music},
  author={Mark D. Plumbley and Samer A. Abdallah and Thomas Blumensath and Mike E. Davies},
  journal={Signal Processing},
We consider two approaches for sparse decomposition of polyphonic music: a timedomain approach based on shift-invariant waveforms, and a frequency-domain approach based on phase-invariant power spectra. When trained on an example of a MIDI-controlled acoustic piano recording, both methods produce dictionary vectors or sets of vectors which represent underlying notes, and produce component activations related to the original MIDI score. The time-domain method is more computationally expensive… CONTINUE READING
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