Theoretical key the signature this leads to a key whose key signature has an additional sharp. A piece in C that performs this modulation would lead to the theoretical key of G major, requiring eight sharps, meaning an F in place of the F already present. To write that passage with a new key signature would require recasting the new section using the enharmonically equivalent key signature of A major. An example of such recasting is Claude Debussy's "Suite bergamasque": in the third movement "Clair de lune" the key shifts for a few measures from D major to D minor (eight flats),
Au clair de la lune clair de la lune" as the basis of his song "Pierrot" ("Pantomime", L. 31) from "Quatre Chansons de Jeunesse". Erik Satie quoted this song in the section "Le flirt" (No. 19) of his 1914 piano collection "Sports et divertissements". In 1926, Samuel Barber rewrote "H-35: Au Claire de la Lune: A Modern Setting of an old folk tune" while studying at the Curtis Institute of Music. In 1928, Marc Blitzstein orchestrated "Variations sur 'Au Claire du la Lune'." In 1964, French pop singer France Gall recorded a version of this song, with altered lyrics to make it a love song.