What is Oblique Motion?

Oblique motion is a type of motion between two musical voices in which one voice stays on the same pitch while the other moves up or down. This creates a contrast between a stationary note and a moving line, adding variety and interest to the harmonic texture.

For example, if the soprano voice remains on C while the bass voice moves from G to F, the voices are in oblique motion. Only one line changes pitch, while the other provides a stable reference point.

Oblique motion is commonly used in counterpoint, choral writing, orchestration, jazz, and classical harmony. It allows composers and arrangers to create smooth voice leading, highlight certain notes, and add tension or emphasis without moving all voices simultaneously.