I use a plugin from winamp.com, just search for "pitch" on the plug-in site.

hope that help

I use MJ Studio.

Acid Pro 4.0

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Sound Forge,
also by sonic foundry

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Any wave editor will do fine. Cool Edit, Steinberg Wavelab, Soundforge, etc. Just read the help files in each about bpm.

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Whence September dusk grows crisper still,
with leaves all crimson conquered,
I yearn to shout,
and dance about,
and stick pickles in my honker...