In 1848 Charles Dawson of England described a more complex travelling valve device which added little to Bain.

However, the air flow is not sufficient to drive a piano mechanism. Simple reed and pipe organs using this sort of system are still being produced. In 1847 Alexander Bain described a device that used a paper roll as a 'travelling valve' that allowed air to flow through the reeds of a reed organ. The concept was sound, but the device described was impractical in the way it read the roll and operated the piano. The earliest description of a piano playing device using perforated paper rolls was Claude Seytre's French patent of 1842. At this exhibition were a number of automatic player devices, including the Pianista, that contained the elements which would lead to the player. The start of the player period can probably be seen as the Centennial Exposition of 1876 in Philadelphia, USA.

The acceleration of developments leading to the pneumatic 'player' device started in the 1840s and began to reach some recognizable device in the 1870s. This bellows struck the piano key and so played the note. The earliest practical piano playing device was probably the Forneaux Pianista, which used compressed air to inflate a bellows when the barrel pin opened a valve. The development of the player piano was the gradual overcoming of the various difficulties of controlled percussive striking and note duration. This plays the note, but at a fixed dynamic and with a tremolo action quite unlike a pianist. The hammers hit repeatedly until the pin is removed. Barrels do not provide a percussive force, but a relatively gentle switching motion.Д®arly barrel pianos move the hammer back and forwards continuously as the operator turns the handle, but the hammers do not strike the strings until moved slightly forwards by a pin in the barrel. It proved to be difficult for a player device to combine a variable percussive force and a controlled note duration. The entire force required to sound the note must be given by the performer hitting the keys. The pianoforte is a complex instrument, requiring each note to be struck with a different force to control the dynamics of the performance.

The playing task is ideally performed by a pinned barrel, and the art of barrel organs was well advanced by the mid eighteenth century. The power for the notes is provided by air from a bellows system, and the organist or player device only has to operate a valve to control the available air. These devices were later extended to operate musical boxes, which contain a set of tuned metal teeth plucked by the player mechanism.ДЄn early musical instrument to be automated was the organ, which is comparatively easy to operate automatically. The idea of using pinned barrels to operate percussion mechanisms (such as striking bells in a clock) was perfected long before the invention of the piano. The idea of automatic musical devices can be traced back many centuries. Fact|date=August 2008 The advent of electrical amplification in home music reproduction via the gramophone and wireless in the mid 1920s caused the eventual decline in popularity. 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 player piano is a self-playing piano, containing a pneumatic mechanism that plays on the piano action pre-programmed music via perforated paper rolls.

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