Читать книгу Principles of Orchestration, with Musical Examples Drawn from His Own Works - Rimsky-Korsakov Nikolay - Страница 13

The formation of the group of brass instruments, like that of the wood-wind is not absolutely uniform, and varies in different scores. The brass group may be divided into three general classes corresponding to those of the wood-wind (in pair's, in three's, and in four's).

Group corresponding to the wood-wind in pair's	Group corresponding to the wood-wind in three's	Group corresponding to the wood-wind in four's
		(II—Small trumpet).
2 Trumpets I, II.	3 Trumpets I, II, III.	3 Trumpets I, II, III.
	(III—Alto trumpet	(III—Alto trumpet or
	or:	Bass trumpet.)
	{ 2 Cornets I, II.
	{ 2 Trumpets I, II.)
4 Horns I, II, III, IV.	4 Horns I, II, III, IV.	6 or 8 Horns I, II, III, IV, V, VI, VII, VIII.
3 Trombones.	3 Trombones I, II, III.	3 Trombones I, II, III.
1 Tuba.	1 Tuba[8].	1 Tuba.

The directions are the same as in the preceding table for wood-wind. It is evident that in all three classes the formation may vary as the composer wishes. In music for the theatre or concert room page after page may be written without the use of trumpets, trombones and tuba, or some instrument may be introduced, temporarily as an extra. In the above table I have given the most typical formations, and those which are the most common at the present day.

Note I. Besides the instruments given above, Richard Wagner used some others in The Ring, notably the quartet of tenor and bass tubas, and a contrabass trombone. Sometimes these additions weigh too heavily on the other groups, and at other times they render the rest of the brass ineffective. For this reason composers have doubtless refrained from employing such instruments, and Wagner himself did not include them in the score of Parsifal. Some present-day composers (Richard Strauss, Scriabine) write for as many as five trumpets.

Note II. From the middle of the 19th century onward the natural brass disappeared from the orchestra, giving place to valve instruments. In my second opera, The May Night I used natural horns and trumpets, changing the keys, and writing the best notes "stopped"; this was purposely done for practise.

Though far less flexible than the wood-wind, brass instruments heighten the effect of other orchestral groups by their powerful resonance. Trumpets, trombones, and tubas are about equal in strength; cornets have not quite the same force; horns, in forte passages, are about one half as strong, but piano, they have the same weight as other brass instruments played softly. To obtain an equal balance, therefore, the marks of expression in the horns should be one degree stronger than in the rest of the brass; if the trumpets and trombones play pp, the horns should be marked p. On the other hand, to obtain a proper balance in forte passages, two horns are needed to one trumpet or one trombone.

Brass instruments are so similar in range and timbre that the discussion of register is unnecessary. As a general rule quality becomes more brilliant as the higher register is approached, and vice versa, with a decrease in tone. Played pp the resonance is sweet; played ff the tone is hard and "crackling". Brass instruments possess a remarkable capacity for swelling from pianissimo to fortissimo, and reducing the tone inversely, the sf p effect being excellent.

The following remarks as to character and tone quality may be added:

a) 1. Trumpets (B♭-A). Clear and fairly penetrating in tone, stirring and rousing in forte passages; in piano phrases the high notes are full and silvery, the low notes troubled, as though threatening danger.

2. Alto trumpet (in F). An instrument of my own invention, first used by me in the opera-ballet Mlada. In the deep register (notes 2 to 3 in the trumpet scale) it possesses a fuller, clearer, and finer tone. Two ordinary trumpets with an alto trumpet produce greater smoothness and equality in resonance than three ordinary trumpets. Satisfied with the beauty and usefulness of the alto trumpet, I have consistently written for it in my later works, combined with wood-wind in three's.

Note. To obviate the difficulty of using the alto trumpet in ordinary theatres and some concert rooms, I have not brought into play the last four notes of its lowest register or their neighbouring chromatics; by this means the alto trumpet part may be played by an ordinary trumpet in B♭ or A.

3. Small trumpet (in E♭-D). Invented by me and used for the first time in Mlada to realise the very high trumpet notes without difficulty. In tonality and range the instrument is similar to the soprano cornet in a military band.

Note. The small trumpet, (B♭-A) sounding an octave higher than the ordinary trumpet has not yet appeared in musical literature.

b) Cornets (in B♭-A). Possessing a quality of tone similar to the trumpet, but softer and weaker. It is a beautiful instrument though rarely employed today in theatre or concert room. Expert players can imitate the cornet tone on the trumpet, and vice versa.

c) Horn (in F). The tone of this instrument is soft, poetical, and full of beauty. In the lower register it is dark and brilliant; round and full in the upper. The middle notes resemble those of the bassoon and the two instruments blend well together. The horn, therefore, serves as a link between the brass and wood-wind. In spite of valves the horn has but little mobility and would seem to produce its tone in a languid and lazy manner.

d) Trombone. Dark and threatening in the deepest register, brilliant and triumphant in the high compass. The piano is full but somewhat heavy, the forte powerful and sonorous. Valve trombones are more mobile than slide trombones, but the latter are certainly to be preferred as regards nobility and equality of sound, the more so from the fact that these instruments are rarely required to perform quick passages, owing to the special character of their tone.

e) Tuba. Thick and rough in quality, less characteristic than the trombone, but valuable for the strength and beauty of its low notes. Like the double bass and double bassoon, the tuba is eminently useful for doubling, an octave lower, the bass of the group to which it belongs. Thanks to its valves, the tuba is fairly flexible.