UNITYBut while contrast is necessary to keep the audience from becoming bored or weary, there must not be so much variety that a lack of unity is felt in the program as a whole. It must be constructed like a symphony—out of material that has variety and yet that all belongs together. In other words, the program, like a musical composition, must achieve unity in variety; and this is the second main problem confronting the conductor or performer who is planning a concert. It is impossible to give specific directions as to how unity is to be secured, for this is a matter to be determined almost wholly upon the basis of taste, and taste is not subjectable to codification. The most that we can do for the amateur at this point, as at so many others, is to set before him the main problem involved, and in constructing a program, this is undoubtedly to provide variety of material and yet to select numbers that go well together and seem to cohere as a unified group.
LENGTHOur third question in making a program of musical works is, how long shall it be? The answer is, "It depends upon the quality of the audience." An audience composed largely of trained concert-goers, many of whom are themselves musicians, can listen to a program composed of interesting works and presented by a first-rate artist even though it extends through a period of two and a half hours, although on general principles a two-hour program is probably long enough. But one made up mostly of people who have had very little musical training, who read little except the daily newspaper and the lightest sort of fiction, and whose chief amusement is probably attendance upon the picture show,—such an audience must not be expected to listen to a program that is either too heavy or too long; and our judgment is that for such a group a program an hour and a half long is probably more suitable than one of two or two and a half hours. Our feeling is,
