Nikolai Rimsky-Korsakov · section 25 of 96

Melodic Intervals of a Fourth and a Fifth in One of the Three Upper Parts

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§ 25. — 1) Notes forming a melodic movement of a fourth or a fifth in one of the upper parts may be harmonized by two chords of different degrees: I–IV; I–V.

2) If the first note belongs to a triad, the second must belong to a sixth chord, and vice versa.

3) Two leaps of a fourth or a fifth at the same time in two different parts are to be avoided.

4) The distance between the three upper parts must not exceed an octave.

In the upper part: a) leaps between roots, b) leaps between fifths of the chords, each pairing a triad with a sixth chord; two progressions marked bad for hidde — Fig. 91 · See it in the reader

a) Leaps between root notes; the sixth chord with the root doubled.

b) Leaps between notes that are fifths of their chords: the sixth chord with the fifth doubled.

In an inner part: the tenor leaps a fourth or a fifth, each pairing a triad with a sixth chord — Fig. 92 · See it in the reader