Which type of musical motion involves both voices moving in the same direction?

The term that describes both voices moving in the same direction is referred to as parallel motion. In this type of motion, if one voice ascends or descends, the other voice follows suit by moving either up or down in a similar pattern, maintaining the same interval distance between the parts. This kind of motion creates a harmonic consistency and is particularly common in various musical styles, supporting both melody and harmonic texture.

Oblique motion involves one voice staying on a single pitch while the other moves, contrary motion describes voices moving in opposite directions, and heterophony denotes the simultaneous variation of a single melody by different voices, which doesn’t focus on directional movement. Understanding these distinctions is crucial when analyzing voice leading and harmonic progression in music.