Stringed 2

Stringed 2 allows you to tweak any song speed and pitch. With this application you will be able to change any song pitch up to 12 semitones (up and down).

Also you can tweak the tempo from 1/4 of the real speed up to 1.75X. Stringed will open audio files encoded in: .aiff, .wav, .mp4 and .mp3.