Musical Ears is music ear training App to feed perfect pitch or relative pitch. A sense of pitch may grow if you play successively.- Single Lesson and Chord Lesson. – Top note can be fixed.Requirement:OS 1.6 or later, Device supports Midi.Version3.2: support LVL.Version3.3: Bug of making melody is fixed.Version 4.0: 1)Add way to edit note : Tap the mark of up and down. 2)Add settings : Select note octave number of the center C, "C3 or C4". 3)Add settings : Display of notes, "C,D,E… or Do,Re,Mi…".