Calling all Piano Players! Press the letters referring to the keys, the keys will sound. C = Do | D = Re | E = Mi | etc. BUT ..... I added some sharps/flats! I = Do#/Re ♭ | J = Re#/Mi ♭ | N = Fa#/So ♭ | M = So#/La ♭ | K = La#/Si ♭ | I tried to make it convenient for the keyboard (if you are using a QWERTY keyboard), though it may be confusing at the start. Unfortunately, I only managed to make 1 octave and this is currently only available for laptop users. I will try to figure that out soon.