Of all musical instruments the pianoforte is the most intimate and at the same time the most public--"the favorite of the lonely mourner and of the solitary soul whose joy seeks expression" and the tie that unites the circle of family and friends. Yet it also thrills the great audience of the concert hall and rouses it to the highest pitch of enthusiasm. It is the king of instruments, and the reason for its supremacy is not far to seek. Weitzmann, the author of the first comprehensive account of the pianoforte and its literature, speaks of its ability "to lend living expression to all phases of emotion for which language lacks words"; its full, resonant tone; its volume vying with that of the orchestra; its command of every shade of sound from the gentlest _pianissimo_ to the most powerful _forte_; and its mechanism, which permits of the most rapid runs and passages, and at the same time of sustained singing notes and phrases.
But this is not all. There is an overture by Weber entitled "The Ruler of the Spirits." Well, he who commands the row of white and black keys is ruler of the spirits of music. He has music, all that music can give, within the grasp of his two hands, under his ten fingers. The pianoforte can render anything in music. Besides music of its own, it can reproduce the orchestra or the voice with even greater fidelity than the finest engraving renders a painting; for only to the eyes of one familiar with the painting does the engraving suggest the color scheme of the original, whereas, through certain nuances of technique that are more easily felt than described, the pianoforte virtuoso who is playing an arrangement of an orchestra composition can make his audience hear certain instruments of the orchestra--even such characteristic effects as the far-carrying pizzicato, or the rumbling of the double basses or their low growl; the hollow, reverberating percussions of the tympani; sustained notes on the horns; the majestic accents of trombones; the sharp shrill of piccolos; while some of the most effective pianoforte pieces are arrangements of songs.
Moreover, there are pianoforte compositions like the Hungarian rhapsodies of Liszt which, while conceived and carried out in the true spirit of the instrument ("pianistic," as they say), yet suggest the tone colors of the orchestra without permitting these to obtrude themselves too much. This is one of the many services of Liszt, the giant of virtuosos and a giant among composers, to his art. It has been said that Liszt played the whole orchestra on the pianoforte. He did even more. He developed the technique of the instrument to such a point that the suggestion of many of the clang tints of the orchestra has become part of its heritage. This dual capacity of the pianoforte, the fact that it has a tone quality wholly peculiar to itself, so that when, for example, we are playing Chopin we never think of the orchestra, while at the same time it can take up into itself and reproduce, or at least suggest, the tone colors of other instruments, is one of its most remarkable characteristics.