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B. Combination of wind and brass in octaves.

Doubling the horns in octaves by clarinets, oboes or flutes often
replaces the combination

This is done when it is a question of introducing a rich tone into
the upper octave which the trumpet is not capable of imparting.
If a single horn is used, the upper part is allotted to 2 clarinets,
2 oboes, or 2 flutes. But it there are two horns playing the lower
octave in unison, three or four wind instruments will be necessary
above, especially in forte passages:

[ILLUSTRATION]

8[2 Ob. or 2 Cl. or 2 Fl./1 Horn as well as 1 Ob. + 1 Cl./1 Horn]8;2 Fl. + 2 Cl./2 Horns]8.

To double a trumpet in the upper octave three or four wind instruments
are required, but in the top register two flutes will suffice.

Wood-wind instruments should not be used to double a trombone
in the octave above; trumpets are more suitable.

Examples of doubling in octaves:

• * Snegourotchka [ILLUSTRATION]

  Ob. + Cl./Horn.] 8.

• * Legend of Tsar Saltan, before 180 — [ILLUSTRATION]

  Ob. + Cl./Ob. + Cl.]6/Horn/Horn]6]8.

* Mention should also be made of mixed timbres (wood and brass) in progression in octaves.

Examples:

• Mlada, Act III, beginning of Scene III — [ILLUSTRATION]

  Trombone + Bass cl./Tuba + C-fag.]8.

• No 78 Mlada, Act III, after 25 — [ILLUSTRATION]

  2 Cl. + 2 Horns + Trombone/Bass Cl. + 2 Horns + Trombone] 8

  
  (low register).
• No. 79. Mlada, Act III, before 35 — general unison.

When it is desired to distribute the melody over three or four
octaves, it is difficult to achieve perfect balance of tone.

Examples:

• * Shéhérazade, 4th movement, 15th bar after W — [ILLUSTRATION]

  Picc./2 Fl. + 2 Ob./2 Trumpets]8.

• * Legend of Tsar Saltan 228 — [ILLUSTRATION]

  Picc./2 Fl. + 2 Ob./Trumpet + Eng. horn]8.