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A set of non-sparse filters for our ensemble of birdsong. B: Sparse filters calculated for an ensemble of human voice recordings. These recordings were made using a Pearl CC 30 microphone in a semi-anechoic chamber, at a sampling rate of 44,100Hz. The text used was Jonothan Swift’s A Modest Proposal. This text is in the public domain. Both the text and the original WAV files can be found at http://www.maths.tcd.ie/~mnl.
