Musician's Practice Edge is described as 'imed at musicians working with video or audio material. Hold all of your music courses and audio files in the one spot, regardless of who you bought them from' and is an app in the Audio & Music category. There are more than 10 alternatives to Musician's Practice Edge for a variety of platforms, including Windows, Mac, iPhone, iPad and Linux. The best alternative is Transcribe!. It's not free, so if you're looking for a free alternative, you could try Amazing Slow Downer or Audioalter. Other great apps like Musician's Practice Edge are AudioScrub (Paid), AudioRetoucher (Paid), Playable (Paid) and Tune Transcriber (Free).
Change the speed of the music - from 20% (one fifth speed) to 200% (double speed) without changing the pitch. Wrong key? Change the pitch in semi-tones - at full or changed speed. Out of tune? Adjust the pitch in cents (100ths of a semi-tone) to suit your instrument.