<P> A prepared piano is a piano that has had its sound altered by placing objects (called preparations) on or between the strings . </P> <P> Although theoretically any object could be used to prepare a piano, in practical application preparation objects are usually expected to have certain characteristics: </P> <Ul> <Li> They are applied directly to the piano strings; </Li> <Li> They must fit in the desired location inside the piano; </Li> <Li> They (usually) should not move from their location during playing; </Li> <Li> They must be reversible (that is, when a properly prepared piano has been "unprepared", it should be impossible for anyone to tell that it had ever been prepared; no permanent damage is done to the piano). </Li> </Ul> <Li> They are applied directly to the piano strings; </Li>

Where are objects of prepared piano placed in relation to the piano
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