Section 26.2 Types of Motion¶
Definitions must be set out regarding types of motion between two parts.
Contrary motion occurs when the two voices move in opposite direction to each other by step or leap.
Oblique motion occurs when one voice stays the same and the other voice moves up or down by step or leap.
Similar motion occurs when both voices move in the same (or “similar”) direction—both up (by step or leap) or both down (by step or leap); similar motion is also called “direct” motion
Parallel motion is a specific type of similar motion and occurs when both voices move in the same direction by the same interval—both up by step, or both down by a third.