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),
Suite algérienne Suite algérienne "Suite algérienne" in C major, Op. 60 is a composition by Camille Saint-Saëns in four movements. The composer had a lifetime love for Algeria. In 1873, he visited it for the first time. The theme of the third movement of the suite came to him during that visit. He composed a single-movement "Rêverie orientale", which was performed in Paris on 7 June 1879 at a charity concert under composer's direction. His publisher Auguste Durand asked him to write more pieces like this one. So in the summer 1880, which he spent in Boulogne-sur-Mer, Saint-Saëns composed three other movements: