All you need to learn a song by ear is to practice over again, hope SpeedPitch can help you! Main Features - To change song speed (0% - 200%) without any change in pitch - To change song pitch (-1 octave to +1 octave) without any change in speed. - To load a song from iPod library in your iPhone and iPad. Cautions - Only support iOS8 or later. - Songs on iCloud, downloaded from iTunesMusic or copy protected cannot be played. - Contact me if any error occurs. Update - 2015.09. iOS9 supported. - 2016.02. Ver1.6 released. - 2016.02. Ver1.7 released. Bug fixed.