• The first is the Free mode, where the user can practice at will, because this mode does not display the score, that way if you miss the tone that was played, he will be informed that missed, but he can continue as long as he desire. And also the user choose whether to play with all the sounds (including sharps) or if he just wants the seven natural notes.
• The second is the Normal mode, where the user will practice only with the seven natural notes.
• The third is the Hard mode, where the user is more challenging, since the user will have to distinguish between sharps tones.
• The fourth is the Insane mode where the application will play a sequence of tones, and the user has to click on the buttons that correspond respectively to the tones played. At this level the user will choose whether to play with all the sounds (including sharps) or if you just want the seven natural notes.