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:
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
motion is generally described in terms of simple intervals.
Indirect motion occurs when two parts
move in dissimilar directions.
motion is indirect motion that occurs when two parts move in
FIGURE 4.1: Contrary Motion
motion is indirect motion that occurs when one part moves and
another sustains or repeats.
FIGURE 4.2: Oblique Motion
motion occurs when two parts move in the same direction.
Similar motion is direct motion that occurs when
two parts move in the same direction producing different harmonic
FIGURE 4.3: Similar Motion
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.