What is, however, due particularly to the Italian influence is the persistent intrusion of a dance form in the cycle—usually a minuet. We find it in Alberti, in Christian Bach, and especially in the clavecin works of Jean Schobert, a young Silesian, resident in Paris from about 1750 to 1766, one of the most brilliant clavecinists of his day, one of the most charming, and one who brought a very decided influence upon the development of the young Mozart.
The Italian tendency was invariably to put at the end of the sonata a movement of which the lightness and gaiety of the contents were to bring refreshment or even relief after the more serious divulgences of the earlier movements,—a rondo or even a dance. To this impulse Haydn and Mozart both yielded, retaining from Emanuel Bach only the standard number of three movements.
It must be added here that something is due to Slavic influences in the ultimate general triumph of the objectively gay over the subjectively profound in the last movement or movements of the sonata and the symphony. Not only did Haydn incorporate in the scheme the lively expressive melodies and the crisp rhythms so native to the Slavic peoples among whom he grew to manhood. Earlier than he the Bohemian, Johann Stamitz, had thus enlivened and clarified the symphony, and given it the great impetus to future development which bore so splendidly in Vienna. And Schobert, whom we have but now mentioned, was from a Polish land. What such men brought was essentially of spiritual significance; but in music, as in other arts, the new spirit brings the new form.
As we have already said, the number and sequence of movements in the pianoforte sonata has never been rigidly fixed. But an average combination is clear. The majority of sonatas by Haydn and by Mozart, as well as by lesser men like Clementi, Dussek and Rust, and many of the sonatas by Beethoven, are in three movements. Of these the first and last are invariably in the same key (major and minor). The first movement is normally of a dignified, formal, and more or less involved character, though such a generalization may be quickly stoned to death by numbers of conspicuous and great exceptions. The second movement is normally in a key contrasting with the first movement, usually of slow and lyrical character, usually also simple, at least as regards form. The last movement is, in perhaps the majority of cases, more brilliant, more obvious and more rapid than the others, calculated to amuse and astonish the listener rather than to stir his emotions, to send him away laughing and delighted, rather than sad and thoughtful.
The number three was established by Emanuel Bach. The character of the last movement, however, was determined by Italian and Slavic influences, and is somewhat reminiscent of the suite. If one more sign is necessary of the complex crossing and recrossing of various lines of development before the pianoforte sonata rose up clear on its foundations, we have but to note the curious facts that the suite was neglected in Italy during the seventeenth century in favor of the string sonata; that the suite reached its finest proportions in Germany, chiefly at the hands of Sebastian Bach; that through Sebastian Bach the three-movement sonata group passed from the Italian Vivaldi to Emanuel Bach, who established it as a norm; finally that the Italians, who neglected the suite in the seventeenth century, conceived an enthusiasm for it in the eighteenth and brought their love of it to bear on the German sonata group, introducing the minuet and giving to the last movement the lively care-free form of a dance or a rondo.
Before proceeding to outline the development of the triplex form in which at least one movement of this sonata group was written and which is one of the most distinctive features of the sonata, it is not out of place to stop to consider what relationship, if any, existed between the movements. Was the sonata as a whole an indissoluble unit? Rather decidedly no. The grouping of several movements together came to be as conventional and as arbitrary, if not so regular, as the grouping of the suites. There is about the sonatas of Emanuel Bach a certain seriousness and an emotional genuineness which might prevail upon the pianist today, if ever he should think of playing them in concert, to respect the grouping in which the composer chose to present them to the world. But there is no organic life in the sonatas as a whole. Occasionally in his sonatas and in those of Clementi and Haydn the slow middle movement leads without pause into the rapid finale. In these cases, however, the slow movement is introductory to the last, to which it is attached though not related.
Haydn, Mozart and even Beethoven took movements from one work and incorporated them in another. Moreover, it was the custom even as late as the time that Chopin played in Vienna, to play the first movement of a symphony, a concerto or a sonata early in a program and the last movements considerably later, after other works in other styles had been performed. The sonatas and symphonies of the last quarter of the eighteenth and the first quarter of the nineteenth centuries in the main lacked any logical principle of unity. We say in the main, because Emanuel Bach, F. W. Rust, and Beethoven succeeded, in some of their greatest sonatas, in welding the movements inseparably together. Clementi, too, in the course of his long life acquired such a mastery of the form. But these developments are special, and signalize in a way the passing on of the sonata. As a form the sonata proper was doomed by the lack of a unity which composers in the nineteenth century felt to be necessary in any long work of music.
The day will come, if indeed it has not already come, when most sonatas will have been broken up by Time into the various distinct parts of which they were pieced together. Out of the fragments future years will choose what they will to preserve. Already the Bach suites have been so broken. It makes no difference that their separate numbers are for the most part of imperishable stuff. Movements of Haydn and Mozart will endure after their sonatas as wholes are dead. So, too, with many of the Beethoven sonatas. The links which hold their movements together are often but convention; and there is evidently no convention which Time will not corrode.
II
In looking over the vast number of sonatas written between 1750 and 1800 one is impressed, if one is kindly, not so much by their careless structure and triviality as by their gaiety. In the adagios the composers sometimes doff their hats, somewhat perfunctorily, to the muse of tragedy; but for the most part their sonatas are light-hearted. They had a butterfly existence. They were born one day but to die the next. Yet there was a charm about them. The people of that day loved them. A run and a trill do, it is true, but tickle the ear; but that is, after all, a pleasant tickling. And simple harmonies may shirk often enough the weight of souls in tragic conflict, to bear which many would make the duty of music; yet their lucidity is something akin to sunlight. The frivolities of these countless sonatas are the frivolities of youth. There is no high seriousness in most of them. And our triplex form came sliding into music on a burst of youth. A star danced and it was born.