The aim of a composer is closely allied to the form of his work, to the aesthetic meaning of its every moment and phrase considered apart, and in relation to the composition as a whole. The choice of an orchestral scheme depends on the musical matter, the colouring of preceding and subsequent passages. It is important to determine whether a given passage is a complement to or a contrast with what goes before and comes after, whether it forms a climax or merely a step in the general march of musical thought. It would be impossible to examine all such possible types of relationship, or to consider the rôle played by each passage quoted in the present work. The reader is therefore advised not to pay too much attention to the examples given, but to study them and their bearing on the context in their proper place in the full scores. Nevertheless I shall touch upon a few of these points in the course of the following outline. To begin with, young and inexperienced composers do not always possess a clear idea of what they wish to do. They can improve in this direction by reading good scores and by repeatedly listening to an orchestra, provided they concentrate the mind to the fullest possible extent. The search after extravagant and daring effects in orchestration is quite a different thing from mere caprice; the will to achieve is not sufficient; there are certain things which should not be achieved.
The simplest musical ideas, melodic phrases in unison and octaves, or repeated throughout several octaves, chords, of which no single part has any melodic meaning are scored in various ways according to register, dynamic effect and the quality of expression or tone colour that may be desired. In many cases, one idea will be orchestrated in a different way every time it recurs. Later on I shall frequently touch upon this more complicated question.
Examples:
* Snegourotchka 58; 65 and before 68—sustained note in unison.
There are fewer possible ways of scoring more complex musical ideas, harmonico-melodic phrases, polyphonic designs etc.; sometimes there are but two methods to be followed, for each of the primary elements in music, melody, harmony, and counterpoint possesses its own special requirements, regulating the choice of instruments and tone colour. The most complicated musical ideas sometimes admit of only one manner of scoring, with a few hardly noticeable variations in detail. To the following example, very simple in structure I add an alternative method of scoring:
Example:
[No. 175.] Vera Scheloga, before 35—[a)] actual orchestration, *[b)]—another method.
It is obvious that the method [b)] will produce satisfactory tone. But a 3rd and 4th way of scoring would be less successful, and a continuation of this process would soon lead to the ridiculous. For instance if the chords were given to the brass the whole passage would sound heavy, and the soprano recitative in the low and middle register would be overpowered. If the F sharp in the double basses were played arco by 'cellos and basses together it would sound clumsy, if it were given to the bassoons a comic effect would be produced, and if played by the brass it would sound rough and coarse, etc.
The object of scoring the same musical phrase in different ways is to obtain variety either in tone colour or resonance. In each case the composer may resort to the inversion of the normal order of instruments, duplication of parts, or the two processes in combination. The first of these is not always feasible. In the preceding sections of the book I have tried to explain the characteristics of each instrument and the part which each group of instruments plays in the orchestra. Moreover many methods of doubling are to be avoided; these I have mentioned, while there are also some instruments which cannot be combined owing to the great difference in their peculiarities. Therefore, as regards the general composition of the orchestra, the student should be guided by the general principles laid down in the earlier stages of the present work.