Changing Key or Pitch of Music With Audacity Audio Editor. Audacity can be used for pitch or key change, but it introduces distortion or undesirable artifacts into a song. As an alternative, Song Surgoen provides distortion free audio for key or pitch change. For more information go to
http://www.songsurgeon.com/page/audacity_vs_songsurgeon.html. Download a 4-hour free demo.
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