> The utility of the piano for composing was its neutral and uniform tone color: in theory (although not in reality) the tone quality of the bass is the same as the treble. In any case, the change in tone color over the whole range of the piano is, or should be, gradual and continuous (there are breaks, of course, when the notes go from one string in the bass to two and then to three in the treble). The monochrome piano might be used therefore just for its arrangements of pitches, and the quality of the sound could-absurdly in many cases-be considered secondary.
> What made it possible for composers to refuse to acknowledge the difference on the piano between treble and bass and leave whatever problems arose to be solved by the performer was the fact that the change in tone color over the span of the keyboard is not like the leap from a bassoon to a flute but continuous and very gradual when the instrument is properly voiced. These imperceptible gradations are the result of a deliberate policy of a unified sonority on the part of musicians and instrument makers. All attempts over the history of piano construction to incorporate anything analogous to the picturesque changes of registration in the organ and the harpsichord had little success, were not exploited by composers, and were finally abandoned. Radical contrasts of tone color were traded for the possibility of making a gradual crescendo or diminuendo. This was a decision that took place at the same time as the preeminence accorded to the string quartet over all other forms of chamber music; that, too, emphasized the importance of a unified tone color. Chamber music with wind instruments, while the occasion for several masterpieces, became the exception, an exotic form. That is why the use of colorful sonorities in the orchestra has so often been considered somewhat vulgar, as if calling attention to the sound were paradoxically to detract from the music. The prestige given to pure string sonority is part of the asceticism of nineteenth-century high culture. Contrasts of tone color were given a significantly lower place in the hierarchy of musical elements. This is one reason that only the piano repertory rivals the string quartet as the most respectable medium for private and semiprivate music-making from Haydn to Brahms.