Page "Prepared piano" Paragraph 14

Another precedent to the prepared piano was an experiment by the French composer Maurice Delage ( 1879 – 1961 ): his Ragamalika ( 1912 – 22 ), based on the classical music of India, calls for a piece of cardboard to be placed under the B-flat in the second line of the bass clef to dampen the sound, imitating the sound of an Indian drum.