68
Section 4 - Algorithms
The
parameters
available for
the
Gated Reverb algorithm are:
01
- Mix
02-Volume
See
the
descriptions
under
the Mix
and
Volume Parameters,
in
the beginning of this section.
03-Attack
Range: 1
ms
to 10.0s
Sets
the
attack time of the
gated
reverb once the incoming signal has reached the trigger level.
Generally the attack should
be
short
and
not
set longer than the
Hold
Time. This
parameter
should
not
be
used
to achieve a reverse reverb envelope, because here the attack volume
increases
whereas
in
the Reverse reverb
the
attack volume accelerates.
04 - Hold Time
Range: 1
ms
to 10.0s
This
parameter
sets the
amount
of time
that
the reverb will
hold
after the retrigger
and
before the
release. The
Hold
Time will begin
again
if
retriggered (see diagrams).
05-
Decay
Range: 0.20 to 100.0 sec.
This
parameter
sets the decay rate
much
like in the Reverse Reverb algorithm. In general the
decay
rate
is set
very
high
. Decay rate is
not
offered
in
the Reverse Reverb,
but
the
DP / 4
brings
it
out
here
for special effect
when
low
values are
used
.
06 - Release Time Range: 1
ms
to 10.0s
This
parameter
sets the
amount
of time after the
Hold
Time has elapsed for the
gated
reverb to
shut
down.
Generally these times are very short.
07 - Trigger Threshold Range: -96 to
+00
dB
This
parameter
sets the signal level
that
triggers the gated reverb.
When
the incoming signal
reaches this value,
it
triggers (starts) the
gated
reverb. Higher values
would
require a
stronger
incoming
signal. Set this
parameter
as
low
as possible to
work
with
your
particular source,
but
not
too
low
so as
to
cause false triggering.
08 - Retrigger Threshold Range: -96 to +00
dB
This
parameter
sets the level
at
which
the gated reverb will retrigger. For precise
Hold
Time
that
begins
at
the
onset of the incoming source, this parameter
should
be
set
higher
than
the incoming
signal
to
prevent
retriggering (as
shown
in
the diagrams). After the incoming signal reaches the
trigger threshold, the gated reverb is activated. Every time the signal reaches
the
retrigger
threshold,
the
gated
reverb will retrigger causing the Hold Time to restart.
If
the
level of this
parameter
is set
lower
than
the incoming signal, the gated reverb will continue
to
retrigger
as
shown
in
the
diagrams
.
With
a
high
Decay Rate (parameter 05), this
adds
a
cavernous quality to percussion instruments.
09 - HF Damping Range: 00 to
99
Controls
the
rate of attenuation of
high
frequencies
in
the decay of the reverb. Increasing the
value
of
this
parameter
will
gradually
filter
out
increasing amounts of
high
frequency energy.
We
recommend
a setting of 00.
10
- Diffusion 1 Range:
00
to
99
Smears
the
transients, so as to diffuse
and
smooth the sound. Lower values will cause impulsive
sounds
to
appear
as
a series of discrete echoes, while higher values
tend
to increase the
smear
(smoother sounding). Recommended setting is approximately 50.
ENSONIQ DP/4 Musician's Manual
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