Elisiar

An Elisiar is an Edoan musical instrument. It is comprised of a triple horseshoe-shaped keyboard which operates an echo chamber, plus a mobius strip-shaped strip of resonating bars traditionally made of bone, somewhat similar to a Terran xylophone. USS Enterprise (NCC-1701) crewmember Connors played the Elisiar. 

A'l'e'r'w'w'o'k of the A.C. Walden Medicine Show also played the Elisiar, though he was unable to use it during the group's tour of Troyius in 2381.