The Effects
28
Parameters
THRSH -
Threshold control. The Compressor reduces its gain when the input power exceeds this
value.
RATIO -
Sets the gain reduction ratio. This is the ratio of input power to output power beyond the
threshold. For example, if the threshold is -40 dB, the input signal is -30 dB and the ratio is 2.0 the
output will be -35 dB.
ATT -
Attack rate. Sets how fast the Compressor reduces its gain once the threshold is exceeded.
Higher values equal faster response.
REL -
Release rate. Sets how fast the Compressor restores the gain once the signal has fallen below
the threshold.
LEVEL -
Sets the output level of the block. This is the same control as on the
MIX
page.
KNEE -
Sets the "knee" type. A soft knee gradually varies the compression ratio around the
threshold whereas a hard knee switches from no compression to the selected compression ratio
abruptly at the threshold. With high compression ratios a hard knee may produce undesirable
artifacts. In this case set the knee type to
SOFT
.
MAKEUP -
Makeup gain. When this is on, the output level is automatically compensated allowing
for easier adjustment. The
LEVEL
control can then be used to fine tune the output level.
DETECT -
Selects the type of detector: RMS or peak. RMS detection is smoother, but peak is faster.
Experiment with the type that best suits the program material.
FILTER -
Sets the frequency of a highpass filter on the sidechain input. Raising the frequency can
help prevent low frequencies from “pumping” the entire mix.
SCSEL -
Selects the sidechain input source.
INPUT
is the normal setting and selects the block input
(sum of the rows feeding the block) as the sidechain source. The other settings allow isolating a
single row as the sidechain input. The other rows are summed as usual. By using a row as the
sidechain input you can use the compressor as a ducker or de-esser.
Gate / Expander
