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Dynamics Processors -- Technology
Chapter 6 -- All Together Now...The Big Picture
Figure 25 shows how a gate, expander, compressor and limiter all work together on the same program material in a single channel. The vertical axis is the output level and the horizontal axis is the input level.
Setting all ratios at 1:1 makes the input and output of the circuit the same, as illustrated by the straight diagonal line running at 45° across the graph. Whatever comes in goes out unchanged.
Each of the threshold controls acts like a trigger or hinge point, activating gain reduction or expansion only when the input signal exceeds the set point value.
The ratio controls determine how much of an angle the hinge bends, which is how much gain reduction or expansion occurs above or below the threshold. Graphically, the ratio can swing this hinge from 45° (no processing) to almost 90° (full ratio). It is also possible, by adjusting the threshold controls, to have each of these circuits overlap and interact with each other to develop a dynamic curve. The solid black line shows the resultant curve.
Figure 25. Gate, Expander, Compressor and Limiter All Together.
Next: Chapter 7 -- Special Purpose Dynamics Processor
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