What's a Jangle Piano?

A tack piano (also known as a harpsipiano, jangle piano, and 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.

How is the timbre of a jangle piano different to a normal piano?

Its name comes from the fact that the 'jangle' piano features brass-tipped strips of felt that can be dropped between the hammers to create a hard, percussive tone. It can also be played without these; in this guise the sound is darker and more mellow, with long sustain.

What is a detuned piano?

A detuned piano has 1 or 2 strings out of tune. If you double the sample to get the detuned sound (or use chorus) you will hear twice as many strings. Never sounds like it.