What part of music does sequencing specifically impact?

Sequencing primarily affects the order of musical elements within a composition. In music production, sequencing involves arranging sounds, notes, and samples in a specific sequence to create a cohesive piece of music. It allows the composer or producer to determine not just what notes are played, but when and in what arrangement they occur. This is crucial for creating rhythm, melody, and harmony within a track. By effectively sequencing musical elements, one can build tension, resolve themes, and create dynamic contrasts throughout the piece.

The other choices involve important aspects of music but do not directly pertain to sequencing. For example, volume can be controlled separately from the sequence, tempo denotes the speed at which the piece is played, and the choice of instruments relates to instrumentation rather than the arrangement of elements in time.