Use Audacity to edit mp3's or wav's. If you need to convert it to something else, use SUPER Video converter found here. It converts audio as well as video. And it's also the single best video converter I've ever seen.

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Dan Pemberton
Vacaville, CA

Member, First Baptist Church San Luis Obispo
Formerly ABUSA (We left, so I guess that makes us American Baptists Unleashed!)