In simple terms… The Steering slider control chooses how much of the two processors, Discrete or Loudness, are applied to gain reduction. In Discrete mode each channel has an independent Dynamic Range Controller. In Loudness mode the overall loudness of all channels is processed and dynamic range control is applied to all channels. The Loudness Channel Weighting section to the right allows the weighting of individual channels to be controlled or switched off and is only active in the Loudness section.