To make a small change so a thing fits better. Adjustment assumes the thing was nearly right.

That which adjusts the balance across a range of frequencies. It changes what is heard without changing what was played.

A named value passed in to shape how something runs. Short form of parameter.

A named value passed in to shape how something runs. Parameters are where a general thing becomes particular.

A control that moves along a range rather than choosing between named options. It offers degree instead of decision.