A part in music refers to a component of a musical composition. Because there are multiple ways to separate these components, there are several contradictory senses in which the word "part" is used:
A score with four parts, for Mendelssohn's opus 13 string quartet. The second violin and the viola "parts" above often include two or three simultaneous notes: in some sense, these parts assemble several parts, played by a single player.
In music theory, counterpoint is the relationship of two or more simultaneous musical lines that are harmonically dependent on each other, yet independent in rhythm and melodic contour. The term origi
Gradus ad Parnassum (1725) by Johann Joseph Fux defines the modern system of teaching counterpoint