A player piano is a type of piano that can play music automatically without the need for a human pianist. It uses a system of pneumatic or mechanical devices to read music encoded on paper rolls or digital formats. When the roll is played, the piano hammers strike the keys, producing sound as if a person were playing. Invented in the late 19th century, player pianos became popular in homes and entertainment venues. They allowed people to enjoy music even if they couldn't play an instrument themselves. Today, modern versions may include digital technology, enhancing their capabilities and ease of use.