Behringer MDX2200 manual IKA characteristic of the compressor section

COMPOSER PRO MDX2200

Output				Gain 0 dB
		Threshold
				Ratio 2:1
	Hard Knee			Ratio 4:1
				Limiter oo:1
		IKA Curve
LED	green	yellow	red	Input

Fig. 4.2: IKA characteristic of the compressor section

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.

+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 exclu- sively with the expander/gate and limiter circuits.

4.3.1 Initial settings for the compressor section

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

Tab. 4.2: 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

4. APPLICATIONS 19