Title page of Kuhnan's "Neue Clavier-Übung".
The harpsichord possesses in common with the organ its keyboard or keyboards, which render the playing of solid chords possible. The lighter action of the harpsichord gives it the advantage over the organ in the playing of rapid passages, particularly of those light ornamental figures used as graces or embellishments, such as trills, mordents, and turns. A further comparison with the organ, however, reveals in the harpsichord only negative qualities. It has no volume of sound, no power to sustain tones, no deep pedal notes. Consequently the smooth polyphonic style which sounds rich and flowing on the organ, sounds dry and thin upon the weaker instrument. The composer who would utilize to advantage what little sonority there is in the harpsichord must be free to scatter notes here and there which have no name or place in the logic of polyphony, but which make his music sound well. Voice parts must be interrupted, notes taken from nowhere and added to chords. The polyphonic web becomes disrupted, but the harpsichord profits by the change. It is Chambonnières who probably first wrote in such a style for the harpsichord.
He learned little of it from what had been written for the organ, but much from music for the lute, which, quite as late as the middle of the century, was interchangeable with the harpsichord in accompaniments, and was held to be equal if not superior as a solo instrument. It was vastly more difficult to play, and largely for this reason fell into disuse. The harpsichord is by nature far nearer akin to it than to the organ. The free style which lutenists were driven to invent by the almost insuperable difficulties of their instrument, is nearly as suitable to the harpsichord as it is to the lute. Without doubt the little pieces of Denis Gaultier were played upon the harpsichord by many an amateur who had not been able to master the lute. The skilled lutenist would find little to give him pause in the harpsichord music of Chambonnières. The quality of tone of both instruments is very similar. For neither is the strict polyphony of organ music appropriate; for the lute it is impossible. Therefore it fell to the lutenists first to invent the peculiar instrumental style in which lie the germs of the pianoforte style; and to point to their cousins, players of the harpsichord, the way towards independence from organ music.
Froberger came under the influence of Denis Gaultier and Chambonnières during the years he spent in Paris, and he adopted their style and made it his own. He wrote, it is true, several sets of ricercars, capriccios, canzonas, etc., for organ or harpsichord, and in these the strict polyphonic style prevails, according to the conventionally more serious nature of the compositions. But his fame rests upon the twenty-eight suites and fragments of suites which he wrote expressly for the harpsichord. These are closely akin to lute music, and from the point of view of style are quite as effective as the music of Chambonnières. In harmony they are surprisingly rich. Be it noted, too, in passing, that they are not lacking in emotional warmth. Here is perhaps the first harpsichord music which demands beyond the player’s nimble fingers his quick sympathy and imagination—qualities which charmed in Froberger’s own playing.
Kuhnau as a stylist is far less interesting than Froberger, upon whose style, however, his clavier suites are founded. His importance rests in the attempts he made to adapt the sonata to the clavier, in his experiments with descriptive music, and in the influence he had upon his contemporaries and predecessors, notably Bach and Handel. Froberger is the real founder of pianoforte music in Germany, and beyond him there is but slight advance either in style or matter until the time of Sebastian Bach.
What we may now call the harpsichord style, as exemplified in the suites of Chambonnières and Froberger, is relatively free. Both composers had a fondness for writing in four parts, but these parts are not related to each other, nor woven together unbrokenly as in the polyphonic style of the organ. They cannot often be clearly followed throughout a given piece. The upper voice carries the music along, the others accompany. The arrangement is not wholly an inheritance from the lute, but is in keeping with the general tendency in all music, even at times in organ music, toward the monodic style, of which the growing opera daily set the model.
But the harpsichord style of this time is by no means a simple system of melody and accompaniment. Though the three voice parts which support the fourth dwell together often in chords, they are not without considerable independent movement. They constitute the harmonic background, as it were, which, though serving as background, does not lack animation and character in itself. In other words, we have a contrapuntal, not a polyphonic, style.
A marked feature of the music is the profuse number of graces and embellishments. These rapid little figures may be akin to the vocal embellishments which even at the beginning of the seventeenth century were discussed in theoretical books; but they seem to flower from the very nature of the harpsichord, the light tone and action of which made them at once desirable and possible. They are but vaguely indicated in the manuscripts, and there can be no certainty as to what was the composer’s intention or his manner of performance. Doubtless they were left to the discretion of the player. At any rate for a century more the player took upon himself the liberty of ornamenting any composer’s music to suit his own whim. These agrémens[7] were held to be and doubtless were of great importance. Kuhnau, in the preface to his Frische Clavier Früchte, speaks of them as the sugar to sweeten the fruit, even though he left them much to the taste of players; and Emanuel Bach in the second half of the eighteenth century devoted a large part of his famous book on playing the clavier to an analysis and minute explanation of the host of them that had by then become stereotyped. They have not, however, come down into pianoforte music. It is questionable if they can be reproduced on the pianoforte, the heavy tone of which obscures the delicacy which was their charm. They must ever present difficulty to the pianist who attempts to make harpsichord music sound again on the instrument which has inherited it.
The freedom from polyphonic restraint, inherited from the lute, and the profusion of graces which have sprouted from the nature of the harpsichord, mark the diversion between music for the harpsichord and music for the organ. In other respects they are still much the same; that is to say, the texture of harpsichord music is still close—restricted by the span of the hand. This is not necessarily a sign of dependence on the organ, but points rather to the young condition of the art. It is not to be expected that the full possibilities of an instrument will be revealed to the first composers who write for it expressly. They lie hidden along the way which time has to travel. But Chambonnières, in France, and Froberger, in Germany, opened up the special road for harpsichord music, took the first step which others had but to follow.