An autoharp or chord zither is a string instrument belonging to the zither family. It uses a series of bars individually configured to mute all strings other than those needed for the intended chord. The term autoharp was once a trademark of the Oscar Schmidt company, but has become a generic designation for all such instruments, regardless of manufacturer.

Joseph Campbell Butler is an American drummer, singer and actor. He is a member of the Lovin' Spoonful, who had seven top 10 hits between 1965 and 1966. Butler would replace the bands original drummer Jan Carl and would occasionally sing lead vocals. After John Sebastian left the band in 1968 he took over full lead vocal duties. He would sing fully on their album Revelation: Revolution '69. After the album the band would break up. In 1991 the band would resume touring were Butler would tour singing and playing autoharp.