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The new IKA (Interactive Knee Adaptation) circuit prevents aggressive compression, created by high ratios,
from sounding too unnatural. This is achieved with an interactive control function, which begins above the
threshold level and introduces a “Soft Knee” curve characteristic in the range up to 10 dB above the threshold
point. Beyond this range, the signal is subjected to linear (“Hard Knee”) compression.
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3.3.1 Initial Settings For The Compressor Section
Rotate the THRESHOLD control counterclockwise until an appropriate amount of gain reduction is indicated on
the GAIN REDUCTION meter. This operation will be accompanied by an audible drop in output level. The
OUTPUT control should now be turned clockwise to reinstate the output level. The level of the unprocessed and
the processed signal can be compared by pressing the I/O METER switch and observing the INPUT/OUTPUT
LEVEL meter.
Final adjustments of the controls can then be made to suit your particular requirements, including the RATIO,
ATTACK and RELEASE controls. The AUTO function of the attack and release times, provides program
dependent dynamic processing which suits most standard uses. If a “condensed” or “wider” sound processing
technique is required, the attack and release times can also be manually adjusted.
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Output
Fig. 3.2: IKA characteristic of the compressor section
With the threshold control completely turned to the right, the threshold value is +20 dB. Since
such a value will not be reached in practice, you can use it to disable the compressor section
and work exclusively with the expander/gate and dynamic enhancer circuits.
Tab. 3.2: Initial settings for the compressor section
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AUTOCOM PRO MDX1400
Gain 0 dB
Threshold
Ratio 2:1
Hard Knee
Ratio 4:1
Limiter
IKA Curve
Control
Setting
IN/OUT switch
IN
SC EXT switch
OUT
SC MON switch
OUT
INTERACTIVE switch
IN
SC FILTER switch
OUT
THRESHOLD control
+20 dB
RATIO control
3:1
AUTO switch
IN
OUTPUT control
0 dB
3. APPLICATIONS
oo:1
Input
15
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