Our virtual piano actually works. It is necessary to remember that temperature and humidity of the air affect the speed of sound, so to obtain a perfect functioning an initial calibration should be added. Moreover, tests carried out in the electronics laboratory, in the basement of the University, can't show at best the performance of the virtual piano, because the environment is highly disturbed, there is considerable reflection and continuous disturbances due to the presence of many computers and a lot of electrical and electronic equipments.
The following video shows how our virtual piano works.
