Forte' The term 'F in Music' is a reference to the musical dynamic of Forte, which is an Italian word meaning 'LOUD'. Forte is one of the most commonly used dynamics in music and is used to indicate that a passage should be played loudly. It is usually written as 'f' or 'ff' in sheet music. Forte is often used to contrast with the dynamic of piano, which indicates that a passage should be played softly.