beatkeeper
Beatkeeper is a term used to describe a person or device that maintains a steady tempo or rhythmic reference in a music or timing context. In live music, a beatkeeper may be the musician responsible for keeping time within an ensemble, such as a drummer or percussionist, or it may be a conductor who provides a tempo reference for performers. In electronic and modern pop settings, beatkeeping is often performed by a click track or metronome embedded in a music workstation, allowing performers to synchronize with a fixed tempo.
In recording and production, a metronome or click track provides a reliable tempo for tracking and overdubs,
Beyond music, the concept of a beatkeeper appears in computing and networking as a metaphor for components
Etymology: beatkeeper combines beat, referring to a rhythmic unit or tempo, with keeper, indicating an entity