Nice fairground organ playing. Peeked in the back hoping to the works but all concealed. Spotted the owner and asked "Punched card?" And he replied "Floppy disk"! Apparently punched card books at £60 each, wear out, and the operator has to be always around to swap the books. Floppy disks are £17 quid a tune, contain dozens, so can be left to play. Plays just the same with actuators for the air-powered organ pipes and solenoids for the drum and glockenspiel.