Punch cards can be used in many different ways. Be it as part of an instrument or in a census. As early as 1890, Herman Hollerith established modern data processing with his punched card counting machine, so that the census in the USA was carried out much faster than before. Barrel organs also use punched cards with programmed songs to play their beautiful melodies. But how can you produce music with holes in cards? This is exactly what the participants will explore in this workshop and then create their own little works.