5 - Effects
Core Effects Descriptions
E-MU Digital Audio System
93
f
Tip:
Setting a high
Ratio with the Threshold
at 0dB and the Soft Knee
at -60dB creates a
compressor whose ratio
varies smoothly from
gentle compression at
lower signal levels to
peak limiting at maximum
signal level
In the region between the lower knee and upper Threshold, a variable amount of gain
reduction is applied depending on the signal level and Ratio setting. To keep this gain
reduction from “dragging down” the signal levels at the Threshold point, a comple-
mentary gain boost is automatically applied to all signal levels below the Threshold
when the Soft Knee is enabled. This gain increase with depth and Ratio is illustrated by
the upward arrows in the diagrams, and is similar to the action of the Auto Makeup
Gain parameter. Thus signal levels below the Threshold increase as the Soft Knee depth
and/or Ratio is increased (but see the Gate parameter, below.)
0dB
Threshold -10dB
Threshold -20dB
Threshold -30dB
Knee
-20dB
-80dB
Threshold: -20dB
Ratio = 4:1
Soft Knee
(Varying the Soft Knee Threshold)
0dB
Ratio = 1.5:1
Ratio = 4:1
Ratio = 10:1
-20dB
-35dB
-80dB
Threshold: -20dB
Soft Knee
(Varying the Compression Ratio)
Soft Knee:
Threshold -15dB
This diagram shows the effect of varying the Soft Knee Threshold.
Compres-
sion is 1:1 (no compression) at the Knee Threshold and smoothly transforms into the
selected compression ratio at the Compression Threshold. The upward arrow shows
the additional gain added to signals below the Threshold.
This diagram shows the effect of varying the Compression Ratio
with a
fixed Soft Knee Threshold. The knee transforms from a linear slope to the slope of
the compression ratio over the Soft Knee Threshold area. The upward arrow
shows the additional gain added to signals below the Threshold.
Summary of Contents for 1212M
Page 1: ...1820 1820 Owner s Manual Owner s Manual ...
Page 8: ...8 E MU 1820M 1820 1212M PCI Digital Audio System ...
Page 54: ...4 The PatchMix DSP Mixer Main Section 54 Creative Professional ...
Page 110: ...5 Effects E MU E Wire VST 110 Creative Professional ...
Page 116: ...6 Using High Sample Rates Overview 116 Creative Professional ...
Page 138: ...7 Appendix Internet References 138 Creative Professional ...