Audacity + 另一個去人聲軟體

去人聲
http://www.audacityteam.org/wiki/index.php?title=%E6%B6%88%E9%99%A4%E4%BA%BA%E8%81%B2


降key
http://www.inote.tw/2006/09/audacity-8.html


KaraFun 1.18
http://www.karafun.com/karaokeplayer/