
161Dynamics Processing
feedforward gain control, identical to the feedforward compressor block dia-
gram (Figure6.1a).
The input/ output relationship is represented with a simple graph, such
as the one in Figure6.10. The input signal level is given in decibels by the
horizontal axis, and the output level is given by the vertical axis. When the
input/ output curve has slope 1 (i.e., angled at 45°) and intersects the origin,
the gain of the expander is 1 and the output level is identical to the input
level. A change in the height of this curve corresponds to a change in the
expander’s gain. For the expander, part of the line will have slope g