An Ancient Greek myth tells of the cithara player Eunomos (“Mr Goodtune”). During a competition, the highest string on his five-string cithara broke. At that moment, a cicada landed on the musical instrument and sang in the place of the missing string: together, they won the competition.[30]
Source: Insects in mythology – Wikipedia
Tim B.
https://en.wikipedia.org/wiki/Cicada_(mythology)#Eunomos_and_his_cithara
“Egan (1994) affirms that there are several independent Greek sources that tell the story of Eunomos and the cicada. Eunomos, an accomplished cithara[2] player and singer, was performing in a competition when one of the cithara strings snaps. A cicada as offering, alights on his cithara, sustaining the note of the broken string. Eunomos, thereby attributed accolade, wins the competition. “