Tack piano
A tack piano, also known as a harpsipiano, jangle piano, and a junk piano, is an altered version of an ordinary piano, in which objects such as thumbtacks or nails are placed on the felt-padded hammers of the instrument at the point where the hammers hit the strings, giving the instrument a tinny, more percussive sound. It is used to evoke the feeling of a honky-tonk piano.
Tack pianos are commonly associated with ragtime pieces, often appearing in Hollywood Western saloon scenes featuring old upright pianos. The instrument was originally used for classical music performances as a substitute for a harpsichord.
The song "Killer Queen" by Queen utilises tack piano.
