The ancestry of the piano can be traced to the early keyboard
instruments of the fifteenth and sixteenth centuries --- the spinet, the
dulcimer, and the virginal. In the seventeenth century the organ, the
clavichord, and the harpsichord became the chief instruments of the
keyboard group, a supremacy they maintained until the piano supplanted
them at the end of the eighteenth century. The clavichord’s tone was
metallic and never powerful; nevertheless, because of the variety of
tone possible to it, many composers found the clavichord a sympathetic
instrument for intimate chamber music. The harpsichord with its bright,
vigorous tone was the favorite instrument for supporting the bass of the
small orchestra of the period and for concert use, but the character of
the tone could not be varied save by mechanical or structural devices.
The piano was perfected in the early eighteenth century by a harpsichord
maker in Italy (though musicologists point out several previous
instances of the instrument). This instrument was called a piano e
forte (sort and loud), to indicate its dynamic versatility; its strings
were struck by a recoiling hammer with a felt-padded head. The wires
were much heavier in the earlier instruments. A series of mechanical
improvements continuing well into the nineteenth century, including the
introduction of pedals to sustain tone or to soften it, the perfection
of a metal frame, and steel wire of the finest quality, finally produced
an instrument capable of myriad tonal effects from the most delicate
harmonies to an almost orchestral fullness of sound, from a liquid,
singing tone to a sharp, percussive brilliance.
