 A related technology was John Clark's "Eureka" machine, which was invented a year prior to Euphonia's debut.It was, however, designed with a different function, which was to produce hexameters instead of sound.The Euphonia was exhibited with a female mask covering the mechanical mouth, tongue, and jaw and at times with a dress hanging below the mask, the Euphonia would perform for audiences, pretending to respond to or mimic the words of the keyboard operator.