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OVERVIEW
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COMPRESSOR / LIMITER
12. COMPRESSOR THRESHOLD
This control adjusts the compressor threshold
from -40dB to +20dB.
13. COMPRESSOR THRESHOLD DISPLAY
These three LEDs indicate whether the
input signal is above or below the adjusted
compressor threshold. The white LED in the
middle refers to the AUTOKNEE's "soft knee"
range (if AUTOKNEE is on).
14. COMPRESSOR SC EXT (SIDECHAIN
EXTERNAL) SWITCH WITH LED
This interrupts the link between the signal input
and the compressor control section. At the
same time, an external control signal can be fed
in via the rear panel SIDECHAIN RETURN jack,
taking over control of the input signal dynamics
reduction. This way it is possible to e.g. intensify
the control function in a specific frequency
range by inserting an equalizer in the sidechain.
15. COMPRESSOR SC MON (SIDECHAIN
MONITOR) SWITCH WITH LED
This links the sidechain input signal to the audio
output, thereby muting the audio input signal.
This allows e.g. to pre-monitor the sidechain
signal in combination with an equalizer or other
device inserted into the sidechain channel.
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Note: With the SC MONITOR switch activated,
only the side-chain signal will be present at
the output, which is shown by the flashing LED
switch.
16. COMPRESSOR RATIO CONTROL
This determines the ratio of input vs. output
level for all signals exceeding threshold by
more than 10dB. Although the compression
starts earlier, the AUTOKNEE characteristic
ensures the smooth, inaudible onset of the
gain reduction, which is why the ratio value
will be reached only with 10 dB or more above
threshold. It can be set continuously from 1:1
(no compression) to ∞ :1 (limiter).
17. COMPRESSOR GAIN REDUCTION DISPLAY
This 12-digit display shows the applied gain
reduction (1 to 30 dB).
18. COMPRESSOR LO CONT SWITCH WITH LED
This switch activates a high-pass filter in the
sidechain path and thus avoids the "pumping"
effect caused by high-energy bass frequencies
and their influence on the compression process.
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