Section 4 - Algorithms
GUITAR AMP 3
00
-
Guitar
Amp
3 combines the inverse expander
with
a
bright
distortion for
amp
lead sounds.
The inverse
expander
may
be thought of as a compressor
which
amplifies all signals below
the
threshold. This algorithm
is
optimized for heavy metal
guitar
solos.
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.
03 - Preamp Gain
Range: -
48
to +48 dB
This
parameter
adjusts the amount of boost or cut
applied
to the
EQ'd
incoming signal. Lead
sounds
are obtained using high gain.
04 - Output Level
Range:
00
to
99
This
parameter
controls the
output
level before the
output
EQ.
05 - PreEQ Input
Level
Trim Range: -24 to +00 dB
Controls the
input
level to the
preamp
EQ to eliminate
the
possibility of
clipping
boosted
signals.
06 - Pre-EQ
Fe
Range: 100 to 9999 Hz
This
parameter
determines the filter center frequency of
the
parametric
in
the
preamp
stage.
Higher
values
have
a brighter
sound
.
07 - Pre-EQ Gain
Range:
-48
to +24 dB
This
parameter
adjusts the amount of boost or cut
applied
to the
preamp
parametric.
08-
Pre-EQ Q
Range:
01
to 18
This
parameter
determines the
width
of the resonant
peak
at
the filter center. While the Filter
center
parameter
determines where (at
what
frequency) this
peak
will occur, the Q setting
controls
the
presence of the peak.
09 - ExpndRatio Range:
1:1
to 40:1, infinity
This
parameter
sets the amount of inverse expansion. Expansion occurs
below
the
threshold.
If
this is
set
to
3:1
for example, it will expand the change
in
signals
below
the
threshold
by
three
times
in
an
attempt
to make the signal amplitude approach
the
threshold level.
10
- Threshold Range:
-96
to +00 dB
This
parameter
sets the inverse expander threshold level. Signals
beneath
this level will
be
expanded,
while signals that are above will be unaffected.
As
the
input
signal dies
away
below
the
threshold, the expander will increase the gain of
the
signal.
11
- Gain Change Range:
NlA
This
read
only parameter shows the level of the signal.
12 - Noise Gate Off Below Range:
-96
to +00
dB
This
parameter
sets the lower threshold level at which
the
noise gate
shuts
off
the
audio.
ENSONIQ DP/4 Musician's Manual
87
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