LOW INTERVAL LIMITS
When simple harmonic intervals occur
between the Bass and Tenor voices, limitations must be placed on how low
they may occur. The lowest note the Bass voice may have for a: minor
sixth is G.
tritone is B.
third is c.
second is e.
There are no other restrictions for the Bass voice of any other
intervals. When two voices form a perfect prime the voicing is called
unison. CHAPTER4
Voice Motion
VOICING
Voice
motion is generally described in terms of simple intervals.
INDIRECT MOTION
Indirect motion occurs when two parts
move in dissimilar directions. Contrary Motion
Contrary
motion is indirect motion that occurs when two parts move in
opposite directions:
FIGURE 4.1: Contrary Motion
Oblique Motion
Oblique
motion is indirect motion that occurs when one part moves and
another sustains or repeats.
FIGURE 4.2: Oblique Motion
DIRECT MOTION
Direct
motion occurs when two parts move in the same direction.
Similar Motion
Similar motion is direct motion that occurs when
two parts move in the same direction producing different harmonic
intervals.
FIGURE 4.3: Similar Motion
Parallel Motion
Parallel
motion is direct motion that occurs when two parts move in the same
direction producing the same harmonic interval, without regard for
quality; a major third to a minor third is parallel motion.
FIGURE 4.4: Parallel Motion
Indirect motion is generally
preferred to direct motion.
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