Section 4 - Algorithms
EQ
- COMPRESSOR
114
00
- EQ-Compressor combines
an
EQ
with
a full feature compressor. For
high
compressor
ratios this algorithm functions as a limiter. This algorithm operates
by
compressing (attenuating)
signals above
the
threshold
and
passing the signals below the threshold. For
higher
ratios
and
lower thresholds, this algorithm can be used to create sustain. EQ exists
in
both
signal
and
side
chain paths,
in
contrast to
the
Expander which
has
filtering
in
only
the side chain
path.
Signal Level
-----""'Attenuate
Threshold
1-------------
-----
....
~
Pass
Time
The
parameters
available for this algorithm are:
01-
Mix
02-Volume
See the descriptions
under
the
Mix
and
Volume Parameters,
in
the
beginning of this section. We
recommend a setting of
99.
03 - Compressor Gain Range: -48 to +48
dB
This
parameter
boosts the compressed signal level.
04 - Compressor Ratio
Range:
1:1
to 40:1, infinity
This parameter sets the
amount
of compression. The range is
based
on
decibels (dB) above the
threshold.
If
this is set to 4:1 for example, it will compress changes
in
signals
above
the
threshold
by one
quarter
.
When
this is set to infinity, it acts as a limiter.
05 - Compressor Threshold Range: -96 to +00
dB
This parameter sets the threshold level. Signals
that
exceed this level will
be
compressed, while
signals
that
are below will
be
unaffected. To
tum
off
the
compressor,
set
the
level
to
00
dB.
06 - Gain Change Range:
N/A
This
read
only parameter displays a gain reduction meter.
07 - Comp Attack Range: 50/lS to 100ms
Determines the attack rate after the initial signal
has
been
detected
and
before
the
compression
takes affect.
08 - Comp Release Range: 1 ms to 10.0s
Determines
how
long it takes for the compression
to
be
fully deactivated after
the
input
signal
drops
below the threshold level. This is generally chosen longer
than
the attack time (parameter 06).
ENSONIQ DP/4 Musician's Manual
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