Evidently pleased with this innovation, Kuhnau published in 1696 a set of seven more sonatas called Frische Clavier Früchte. These show no advance over the Sonata aus dem B in mastery of musical structure. Still they are evidence of the efforts of one man among many to give clavier music a life of its own and to bring it in seriousness and dignity into line with the best instrumental music of the day, namely, with the works of such men as Corelli, Purcell, and Vivaldi. That he was unable to do this the verdict of future years seems to show. The attempt was none the less genuine and influential.
In the matter of structure, then, the seventeenth century worked out and tested but a few principles which were to serve as foundation for the masterpieces of keyboard music in the years to come. But these, though few, were of vast importance. Chief among them was the new principle of harmony. This we now, in the year 1700, find at the basis of fugue, of prelude and toccata, and of dance form, not always perfectly grasped but always in evidence. Musical form now and henceforth is founded upon the relation and contrast of keys.
Consistently to hold to one thematic subject throughout a piece in polyphonic style, skillfully to contrast or weave with that secondary subjects, mark another stage of development passed. The fugue is the result, now articulate, though awaiting its final glory from the hand of J. S. Bach. To write little dance pieces in neat and precise form is an art likewise well mastered; and to combine several of these, written in the same key, in an order which, by affording contrast of rhythms, can stir the listener’s interest and hold his attention, is the established rule for the first of the so-called cyclic forms, prototype of the symphony and sonata of later days. Such were the great accomplishments of the musicians of the seventeenth century in the matter of form.
V
In the matter of style, likewise, much was accomplished. We have had occasion frequently to point out that in the main the harpsichord remained throughout the first half of the seventeenth century under the influence of the organ. For this instrument a conjunct or legato style has proved to be most fitting. Sudden wide stretches, capricious leaps, and detached runs seldom find a place in the texture of great organ music. The organist strives for a smoothness of style compatible with the dignity of the instrument, and this smoothness may be taken as corollary to the fundamental relationship between organ music and the vocal polyphony of the sixteenth century.
On the other hand, by comparison with the vocal style, the organ style is free. Where the composer of masses was restricted by the limited ability of the human voice to sing wide intervals accurately, the organist was limited only by the span of the hand. Where Palestrina could count only upon the ear of his singers to assure accurate intonation, the organist wrote for a keyboard which, supposing the organ to be in tune, was a mechanism that of itself could not go wrong. Given, as it were, a physical guarantee of accuracy as a basis for experiment, the organist was free to devise effects of sheer speed or velocity of which voices would be utterly incapable. He had a huge gamut of sounds equally at his command, a power that could be mechanically bridled or let loose. His instrument could not be fatigued while boys could be hired to pump the bellows. So long as his finger held down a key, or his foot a pedal, so long would the answering note resound, diminishing, increasing, increasing, diminishing, according to his desire, never exhausted.
Therefore we find in organ music, rapid scales, arpeggios rising from depths, falling from heights, new figures especially suited to the organ, such as the ‘rocking’ figure upon which Bach built his well-known organ fugue in D minor; deep pedal notes, which endure immutably while above them the artist builds a castle of sounds; interlinked chords marching up and down the keyboard, strong with dissonance. There are trills and ornamental turns, rapid thirds and sixths. And in all these things organ music displays what is its own, not what it has inherited from choral music.
Yet, notwithstanding the magnificent chord passages so in keeping with the spirit of the instrument, in which only the beauty of harmonic sequence is considered, the treatment of musical material by the organists is prevailingly polyphonic. The sound of a given piece is the sound of many quasi-independent parts moving along together, in which definite phrases or motives constantly reappear. The harmony on which the whole rests is not supplied by an accompaniment, but by the movement of the several voice-parts themselves in their appointed courses. And it may be said as a generality that these parts progress by steps not wider than that distance the hand can stretch upon the keyboard.
During the first half of the seventeenth century the harpsichord was but the echo of the organ. Even the collections of early English virginal music, which in some ways seem to offer a brilliant exception, are the work of men who as instrumentalists were primarily organists. In so far as they achieved an instrumental style at all it was usually a style fitting to a small organ. The few cases where John Bull’s cleverness displayed itself in almost a true virtuoso style are exceptions which prove the rule. Not until the time of Chambonnières and Froberger do we enter upon a second stage.
About the middle of the seventeenth century Chambonnières was famous over Europe as a performer upon the harpsichord. As first clavicinist at the court of France, his manner of playing may be taken to represent the standard of excellence at that time. Constantine Huygens, a Dutch amateur exceedingly well-known in his day, mentions him many times in his letters with unqualified admiration, always as a player of the harpsichord, or as a composer for that instrument. Whatever skill he may have had as an organist did not contribute to his fame; and his two sets of pieces for harpsichord, published after his death in 1670, show the beginnings of a distinct differentiation between harpsichord and organ style.