Amplification and elimination of tone qualities.
The operation which consists in contrasting the resonance of two different groups (* or the different timbres of one and the same group), either in sustained notes or chords, transforms a simple into a complex timbre, suddenly, or by degrees. It is used in establishing a crescendo. While the first group effects the crescendo gradually, the second group enters piano or pianissimo, and attains its crescendo more rapidly. The whole process is thereby rendered more tense as the timbre changes. The converse operation—the transition from a complex to a simple timbre, by the suppression of one of the groups, belongs essentially to the diminuendo.
Examples:
[No. 245.] Snegourotchka 313.
" 140 (cf. [Ex. 244]).
A Fairy Tale V.
Shéhérazade, 2nd movement D (cf. [Ex. 74]).
* " 4th movement p. 221.
[No. 246.] Servilia 228; cf. also 44.
The Christmas Night 165 (cf. [Ex. 143]).
[No. 247.] The Tsar's Bride, before 205.
* [No. 248.] Russian Easter Fête D.