Astoundingly good tool for musicians
Using this app you can isolate an instrument, slow down playback (with no key change and superb sound quality) and watch the notes being played on a keyboard in real time. It even makes a good assessment of the chords. A jazz trumpet solo that would have taken an afternoon to transcribe took minutes. Using this I can load up a track and literally hear what is being played in terms of scale degrees etc almost immediately. It is totally addictive and a game changer for me.