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),
Clair de Lune (poem) opportune Ils n'ont pas l'air de croire à leur bonheur Et leur chanson se mêle au clair de lune, Au calme clair de lune triste et beau, Qui fait rêver les oiseaux dans les arbres Et sangloter d'extase les jets d'eau, Les grands jets d'eau sveltes parmi les marbres. Your soul is a well-chosen landscape Where roam charming masks and bergamasques Playing the lute and dancing and seeming almost Sad under their whimsical disguises. While singing in a minor key Of victorious love and good life They don't seem to believe in their own happiness And their song mingles with