Attached Link: http://www.adobe.com/special/products/audition/syntrillium.html

CoolEdit by Syntrillium is good. It's a general-purpose wave editor with pitch-changer included. Also has a variety of filters and envelope modifiers. Oh.. Just looked for it, and found it's been taken over by Adobe. It's now called Adobe Audition, and has been improved since the version I'm using. You can probably find something cheaper, though.

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