!Audacity
http://audacity.sourceforge.net/download/?lang=ja

https://tenacityaudio.org/

!WAV
http://www.kk.iij4u.or.jp/~kondo/wave/

!spLibs
http://www-ie.meijo-u.ac.jp/~banno/spLibs/index-j.html

!Noise
http://taira-komori.jpn.org/noisetop.html

http://www.oshiete-kun.net/archives/2009/05/0906-73.html