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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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