User`s manual

BC 2000 DIGITAL
Audio Routing, Mixing and Processing System for Program Production Centres
.
ARENA DM CONTROL SURFACE
FUNCTIONAL DESCRIPTION
18
3.1.3.1.1. Compressor parameters adjustment.
Select the
"Change Parms"
option and press
OK to access the
display to set the
compressor
parameters. You
can access each
of the
parameters using
the "up" and
“down" cursors
(5), changing the
respective values
using the
encoder (6) or
the “left” cursor to decrease and the “right” one to increase. The middle
button lets you exit this display when the “EXIT” option is selected.
 Threshold: this is the threshold above which the compressor will
act, so that input signal levels that exceed this threshold will be
affected by the compressor settings. The threshold range varies
from -42 dB to +22 dB.
 Attack Time: this is the time it takes the compressor to react to an
increase in the input signal. The shorter this time, the more
sensitive the compressor will be to pulse signals, and the more
action it will take on this type of signals. With a long attack time, the
compressor will not respond as well to pulse changes in the input
signal.
 Release Time: this is the maintenance time during which the
compressor keeps acting, even when the level of the input signal
has fallen below the threshold. A long release time will maintain
uniform compression, even when there are quick fluctuations in the
level of the signal. A short time will enable the compressor to adapt
more quickly to pulse fluctuations in the signal.
 Compression Ratio: a compression ratio of 1:1 does not involve
any variation in the signal, as the level of the input signal is
maintained at the output. A ratio of 2:1 indicates that the level of an
input signal which exceeds the threshold will be reduced to half at
the output. The highest ratio available is 50:1, which will be used to
implement signal limiters. The limiter should reduce all signals
exceeding a certain level to that level.
 Gain: this lets you apply a general gain to the signal. This means a
general increase in the level of the signal, which will especially be
noted at low input levels, under the threshold set. A general
increase in the level of the signal may generate saturation at the
output, even when the signal is being limited.
To correctly set a limiter, a threshold of between 0 and +22 dB should
be selected, with a compression ratio of 50:1 and a gain of 0 dB.