F-sharp
DEFINITION
The raised fourth tone ( subdominant) in the C major scale. In solfeggio, it is called Fi. The frequencies of the audible pitches of F-sharp are notated below. See also [Eng.] F-sharp; [Fr.] Fa di'se; [Ger.] Fis; [It.] Fa diesis; [Sp.] Fa sostenido.