In the case of six sharps or flats, the actual notes are [[enharmonic]]ally identical, which means that on keyboard instruments this represents exactly the same scale, though notated differently. J.S. Bach also used this enharmonic equivalence to prove a point in Book 1 of the ''Well-Tempered Clavier'', in which he wrote the eighth prelude in e{{music|♭}} minor, and its accompanying fugue in d{{music|♯}} minor. | In the case of six sharps or flats, the actual notes are [[enharmonic]]ally identical, which means that on keyboard instruments this represents exactly the same scale, though notated differently. J.S. Bach also used this enharmonic equivalence to prove a point in Book 1 of the ''Well-Tempered Clavier'', in which he wrote the eighth prelude in e{{music|♭}} minor, and its accompanying fugue in d{{music|♯}} minor. |