Fortepiano Wikipedia Direct

: Typically had a range of about five octaves, compared to the modern standard of seven and a third octaves. Historical Significance

The fortepiano was the primary keyboard instrument for major composers of the Classical era , including Joseph Haydn , Wolfgang Amadeus Mozart , and early Ludwig van Beethoven . Fortepiano Wikipedia

: Derived from the Italian words for "loud" ( forte ) and "soft" ( piano ), reflecting its unique dynamic range. : Typically had a range of about five