Yamaha DME Designer Owner's Manual page 335

Compander
The compander combines the effects of a compressor and an expander. A compressor compresses
signals that exceed the threshold, while the expander reduces signals that fall below the threshold.
There are two compander groups, CompanderH (compander hard) and CompanderS (compander
soft). Within each group, there are mono channel and stereo channel companders.
Mono channel companders have one input, one output, and one KeyIn input. Stereo channel
companders have two inputs, two outputs, and one KeyIn input.
CompanderH
Mono channel
Double-click a component to display the component editor for it. The parameters are the same for
mono channel and stereo channel components.
The compander hard and compander soft differ in the compression ratio of their fixed expander. The
expander compression is expressed by the straight portion of the lower-left part of the compander
curve. The compression ratio of the compander hard is large. The slope is also large. The
compression ratio of the compander soft is small, with a gentle compression. The parameters in the
component editor are the same.
CompanderH Mono component editor
1
2
1
Compander Curve
2
Gain Reduction Meter
3
Output Meter
Parameter
4
Threshold -54 dB to ±0 dB
5
Ratio 1:1 to :1
6
Width +1 dB to +90 dB
7
Attack 0 to 120 ms
8
Release 44.1 kHz: 6 ms to 46 s
48 kHz: 5 ms to 42.3 s
88.2 kHz: 3 ms to 23 s
96 kHz: 3 ms to 21.1 s
9
Gain -18 dB to ±0 dB
Stereo channel
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Name
Setting Range
Chapter 6 Component Guide
CompanderS
Stereo channel
Mono channel
CompanderS Stereo component editor
1
2 3
Function
Displays results graphically. The horizontal axis is
the input signal level, and the vertical axis is the
output level.
Displays the gain reduction attenuation.
Displays the output signal level.
Function
Sets the threshold value.
Sets the compression ratio.
Sets the width of the expander.
Sets the attack time.
Sets the release time.
The setting range may very, depending on the
operating frequency.
Sets the output gain.
DME Designer Owner's Manual
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