Audacity

Audacity is a free, easy-to-use, multi-track audio editor and recorder. You can use Audacity to: - Record live audio. - Record computer playback on any Windows Vista or later machine. - Convert tapes and records into digital recordings or CDs. - Edit WAV, AIFF, FLAC, MP2, MP3 or Ogg Vorbis sound files. - AC3, M4A/M4R (AAC), WMA and other formats supported using the optional FFmpeg library. - Cut, copy, splice or mix sounds together. - Numerous effects including change speed or pitch and vocal reduction or isolation (given suitable stereo tracks).