What do a rockabilly musician turned cinematic swamp monster, a composer of player-piano music, an avant-garde cellist, a musical instrument that lent its name to a weapon, a rock musician turned Catholic monk, some of the best audio speakers in the world, and the creator of "Schoolhouse Rock!" have in common? That's right--they all come from Arkansas. "Encyclopedia of Arkansas Music" is a special project of the "Encyclopedia of Arkansas History & Culture (EOA), " an online encyclopedia launched in 2006 by the Butler Center for Arkansas Studies at the Central Arkansas Library System. This colorful, photo-filled reference work spanning all aspects of Arkansas's musical past and present includes more than 150 entries on musicians, ensembles, musical works, and events.