Toy pianos began to be manufactured in the 19th century. In 1863, Henri Fourneaux invented the professional piano, which "plays itself" from a piano spin without the need for a pianist. The player piano is a piano that roll a performance using rolls of critique with perforations, and then replays the performance using pneumatic devices. A new-fashioned equivalent for the pro piano is the Yamaha Disklavier system, which uses solenoids and midi instead of pneumatics Piano Benches and rolls. Silent pianos, which allow a regular piano to be fanatic converted to a digital instrument, are a recent innovation and are becoming more popular.
Since the 1980s, digital pianos have been available, which use digital sampling technology to reproduce the substantial of each piano note. The best digital pianos are sophisticated, with features including working pedals, weighted keys, multiple voices, and MIDI interfaces. However, with such technology, it was difficult to duplicate a crucial aspect of acoustic pianos, namely that when the damper pedal (see below) is depressed, the strings not struck vibrate sympathetically when other strings are struck, as well as the unique instrument-specific mathematical non-linearity of partials on any given unison.
