Here is a cool video of a 1905 81 key Marenghi Organ playing Bohemian Rhapsody by rock group Queen.  So how do you play Bohemian Rhapsody on a 110-year-old Fairground Organ?  The song, which was composed in the 1970's, had to be transcribed onto a long programmable sheet.  The sheet is fed into the machine and read much like the player pianos in old western movies.  This incredible piece of musical machinery is more than just an organ, as it also has other instruments such as a bass drum, cymbal and xylophone.