I am busy recording prepared piano. Don't know what that is? Well its preparing the piano to make is sound different. You can insert thing between the strings and get some interesting effects. The piano can sound like percussion, bells and wood. It can be plucked, bowed , struck or played normally.
John Cage was the first to really explore prepared pianos. Check out one of his Sonatas and Interludes below to hear how it can sound. Other composers such as Marco Trevisani and Michael Edwards have since taken this to a new level by adding electronics in the album Apagon.