Spectrally Speaking is a piece based on a harmonic series from 1000Hz and down (1000, 500, 250, etc).<br>
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The sounds you hear were played on a M-Audio 88es keyboard and created 
from using Paul's Extreme Stretch harmonic filtering function.<br>
A screen shot of the spectral space is here: <a href="http://chrisvaisvil.com/wp-content/uploads/2011/12/spectral-beings.jpg">http://chrisvaisvil.com/wp-content/uploads/2011/12/spectral-beings.jpg</a><br>
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The piece can be downloaded here: <a href="http://micro.soonlabel.com/harmonic_series/IF20111216-spectrally-speaking.mp3">http://micro.soonlabel.com/harmonic_series/IF20111216-spectrally-speaking.mp3</a><br>
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or played online here: <a href="http://chrisvaisvil.com/?p=1913">http://chrisvaisvil.com/?p=1913</a><br>
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(note, the microtonal piece is the SECOND!! piece on this page.)