Fortepiano Wikipedia -

: Unlike the harpsichord , which plucks strings, the fortepiano uses leather-covered hammers to strike them. This allows the player to vary the volume based on the force of their touch.

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

: Between 1790 and 1870, the instrument underwent massive changes—including the introduction of iron frames and felt hammers—eventually becoming the modern piano we recognize today. : Unlike the harpsichord , which plucks strings,