Schumann added more to piano playing by writing in a very original style. His rhythms are very much involved, he treats accompaniments in an unusual manner, and he writes "interlocking" passages, in which both hands have to participate. To play Schumann's music well, a pianist must go through a special series of exercises to fit his hands for the work. Finally Liszt, who felt that the piano was as capable an instrument as the orchestra, if rightly treated, gave us the present development of the varieties of touch. He wrote studies designed to give pianists the most complete independence of finger,--a very necessary thing in modern piano music, in which very often two fingers of one hand may be engaged in enunciating a melody while the other three are assisting in the accompaniment. Liszt showed us the immense value of the loose wrist, without which the velvety quality of tone produced, when required, by such pianists as himself, Rubinstein, and Paderewski, is quite unattainable. Liszt taught his pupils to hold the wrist high, but more recent players use either a high or a low position accordingly as they desire sonority and brilliancy or mellowness and gentleness. The whole development of piano playing has, of course, gone hand in hand with that of piano music, and that has followed the course of music in general. It becomes necessary, then, for us now to review the evolution of piano music. We have seen how it grew out of organ playing and was at first polyphonic. We have seen how the monophonic style--the melody with accompaniment--came in. We must now try to see how the polyphonic style worked itself out in the great compositions of Bach, and how the monophonic style developed itself in a new and highly organized form, the sonata, whose fundamental principles lie at the basis of all modern composition. Chapter IX Climax of the Polyphonic Piano Style The development of the instrumental fugue--What is a fugue?--Its combination of polyphony with development of a theme--Johann Sebastian Bach and his organ and clavichord fugues--Fundamental traits of this music. When instrumental music began to develop independently it naturally followed the lines already followed by vocal music. That had been wholly contrapuntal, and instrumental music was at first entirely polyphonic. In its development the art of music inevitably fashioned certain forms, for no art can exist without form, which is the external demonstration of design. Without design there is no art. Musicians very soon learned that the first principle of form in music was repetition. A phrase of melody once heard and never repeated is quickly forgotten. A dozen different phrases in succession would not make a recognizable tune. The germinal part of the tune has to be heard often, and there must be a beginning, a middle and an end. For example:-- [Music: |--germinal part--|--middle--|--germinal part--|--end--| ]