The player piano is a piano containing a pneumatic mechanism that plays on the piano action pre-programmed music via perforated paper rolls. The true player piano was designed to be a fully interactive musical experience rather than merely an automatic instrument and hence they are fitted with interactive control levers intended for the "player pianist" or "pianolist" to create a music performance to their own taste. The player piano would provide aspiring pianists and music lovers with the technical dexterity they lacked whilst permitting them to control the musical performance interactively as if they were an accomplished pianist. The rise of the player piano grew with the rise of the mass-produced piano in the house and the sheet music industry explosion of the late 19th and early 20th century. The advent of electrical amplification in home music reproduction via the gramophone and wireless in the mid 1920s caused the eventual decline in popularity. Today a new generation is discovering the unique interactive musical experience these old instruments are capable of creating through the efforts of the various enthusiast societies.