Meters for dynamics processing of audio signals

A gain reduction meter for dynamics processing provides information describing which part of a dynamics curve is affecting the input signal. In particular, the gain reduction meter displays an amount of gain reduction due to applying a dynamics processing operation in a manner that differentiates between gain reduction achieved by the different parts of the dynamics curve for that dynamics processing operation. The gain reduction meter has a plurality of display elements. Each display element corresponds to an amount of gain reduction. The illumination of the display elements is controlled such that the appearance of each illuminated display element is dependent on where on the dynamics curve the amount of gain reduction corresponding to that display element is produced.