Hobbies Playing Music Fortississimo (fff) Share PINTEREST Email Print Fortississimo sign in music. Stannered/Wikimedia Commons (CC0-PD) Playing Music Playing Piano Tutorials Piano Chords Buying Advice Music Education Playing Guitar Home Recording By Brandy Kraemer Updated February 06, 2019 Fortississimo is an indication to play as loudly as possible; louder than fortissimo. Also Known As: extrêmement fort, tout fort (Fr) ganz laut (Ger) Pronunciation: for'-tih-SEE-see-moe Common Misspellings: fortisissimo, fortissisimo Fortississimo is abbreviated by at least three f’s and can have as many as fffff. Dynamics refer to the comparable volume changes within a song, and don’t express exact decibel levels; therefore, a song already played in forte might need a few extra f’s to express a fortississimo.