Ballet Class is an APP able to undertake the pianists job by playing music for a classical ballet class. It does what up till now was done with a CD and it offers many more possibilities. Ballet Class allows you to speed up or slow down the music, in real time, while it is playing without having to stop it and without altering the pitch. You may choose the length of each tune by deciding of how many bars it will have to be structured, in this way the music will adapt itself to the exercise and not viceversa. This is what usually happens in a studio when a pianist plays for class. Impossible to achieve until today by simply using a CD or an MP3 player. The APP is user-friendly: starting from the first screen in which you find the TUNE LIST with the tunes ordered according to the traditional sequence of exercises which usually structure a classical ballet class, the APP will guide you easily to the creation of personalized tunes and to their collection in PLAYLISTS. idea and projectAndrea PiermatteimusicGianna BolotovaFabio GhidottiAlbi GoodmanMarcelo Pablo SpaccarotellaPaul SquareproductionBalletto. net SncdevelopmentAdriano BarateLuca A. Ludovico.