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54 Chapter 4 Dynamic
• Threshold Display
The horizontal lines (up to three) in the lower area of the window represent the
Threshold values for Compression (upper line), Expansion (middle line), and
Reduction (bottom line). You can set these values by using the controls of the same
name (see below).
Note: You can select the frequency band that you wish to edit by clicking in the lower
section of each band.
Comp. Ratio
This, in conjunction with Compression Threshold, is the central parameter for
compression. The Comp. Ratio determines the strength or rate of level reduction in the
range you want to compress. In most cases, the most useful combinations of these two
settings are either 1) low Compression Threshold and low Comp. Ratio or 2) high
Compression Threshold and high Comp. Ratio.
Exp. Ratio
This, in conjunction with Expansion Threshold, is the central parameter for controlling
downward expansion. It determines the strength of expansion applicable to the range
that you wish to expand.
Graphic Curve
The graphic curve in the middle of the Multipressor shows the Ratio between input
level (horizontal scale) and output level (vertical scale) of all bands. The colors
correspond to the colors of the frequency bands in the left graphic area. Adjustments
to the Ratio and Threshold controls allow you to change the curvature of the selected
frequency band.
Thresholds
• Compression
Here, you can set the minimum level at which the compressor will begin to work. If
the control is set all the way to the right (0 dB), the entire compressor section of the
Multipressor is off-line. The further you move the control to the left, the lower the
level above which the compressor will work.
• Expansion
Here, you can set the maximum level at which the expander should work. If the
control is set all the way to the left (−50 dB), expansion will only occur on signals that
fall below this level. (The Exp. Ratio can be set to a minimum of 1,2:1; below −50 dB
the expansion always takes place at this low ratio.) The further the control is moved
to the right, the higher the level below which the expander will work.
Reduction
Allows you to define the amount of noise level reduction (this is not a threshold value).
If you move the control all the way to the left, the reduction will be at its maximum
value (−50 dB). If the control is set all the way to the right, no reduction will occur.