Audacity – Open Source Audio Editor

Audacity is free, open source software for recording and editing sounds. It allows you to record live audio, converts tapes and records into digital recordings or CDs, edit Ogg Vorbis, MP3, WAV or AIFF sound files. You also can cut, copy, splice or mix sounds together with Audacity. Built-in effects are given to remove static, hiss, hum or other constant background noises.