http://audacity.sourceforge.net/download/?lang=ja
http://www.kk.iij4u.or.jp/~kondo/wave/
http://www-ie.meijo-u.ac.jp/~banno/spLibs/index-j.html
http://taira-komori.jpn.org/noisetop.html
http://www.oshiete-kun.net/archives/2009/05/0906-73.html
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