Oblique motion is a term commonly used in music theory to describe a type of melodic movement where one note is approached by a diagonal or slanted direction rather than a direct stepwise motion. The spelling of this term can be explained using the International Phonetic Alphabet (IPA) as /əˈbliːk ˈmoʊʃən/, where the first syllable is pronounced with a schwa sound, followed by the stressed long "ee" sound and "k" consonant. The second syllable is pronounced with a long "o" sound followed by the "sh" sound and "un" pronounced as "ən".
Oblique motion refers to a type of movement or motion that occurs in a diagonal or slanting direction. It is characterized by the movement of two or more musical voices or lines, where one moves in a different direction or at a different rate compared to the others.
In the field of music theory, oblique motion is one of the three types of motion that define the relationship between different musical voices or parts in a composition, along with parallel motion and contrary motion. Unlike parallel motion, where two voices move in the same direction and maintain a consistent interval relationship, or contrary motion, where two voices move in opposite directions, oblique motion entails that only one voice or part moves while the other remains stationary or sustains a note. This results in a change in the interval between the voices, as the moving one either expands or contracts the distance to the stationary one.
Oblique motion can be found in various musical contexts, especially in counterpoint and harmonic progressions, where the movements of different voices contribute to the overall texture and melodic structure. It can create tension or interest in a composition, adding variety and color to the musical lines. Additionally, oblique motion can also influence the harmonic progressions by changing the vertical intervals between the voices or parts. Overall, oblique motion is a fundamental concept in music that plays a vital role in the development and construction of musical compositions.
In music, one of the parts holding on a sound, while another rises or falls.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "oblique" comes from the Latin word "obliquus", which means "slanting" or "sideways". It is derived from the Latin prefix "ob-" meaning "towards" and the Proto-Indo-European root "*leik-" meaning "to bend". "Motion" is derived from the Latin word "motio", meaning "movement". Therefore, the etymology of the term "oblique motion" suggests movement or action that is slanting or not in a direct or straight line.