Tesla coil can be used to play music thanks to the phenomenon of electric discharge. In a specially modified version - the so -called musical or 'fictional' coil Tesla - produces electric sparks in the rhythm of music. The basis is the formulation of the frequency of evacuations according to the audio signal, which causes a change in air pressure and creates a hearing sound. As a result, The coil literally 'plays' music using sparks - no speakers or mechanical parts.