Section 4 - Algorithms
EQ - VIBRATO -
DOL
00
- EQ-Vibrato-DDL combines a vibrato effect (a
pitch
shifter
modulating
over a very
small
range)
with
EQ
and
digital delay. Many vintage guitar amplifiers offered a vibrato control,
but
don't
feel that this algorithm is limited to guitars,
try
this
with
other
sources as well. There is a
sample
&
hold
parameter which doesn't
hold
the instantaneous
pitch
shift,
but
if set
properly
will
provide a
"chirping" effect
when
acting
on
the
input
signal.
EQ - Vibrato - DDL Signal Routing
t
Input Level Trim
L
Main
Outputs
The signal enters a programmable EQ,
which
is
preceded
by
an
input
level trim (parameter 17).
The signal is then routed to the vibrato. The vibrato is
routed
directly to the output. The vibrato
also passes through the delay which
is
then
regenerated back into the delay. A different
delay
signal is routed to the
output
on
the right side. This constitutes a
"ping-pong"
delay effect. A
Regen parameter between the delay
sends
controls the delay feedback amount. There are also
two
echoes that are sent to the left
and
right
outputs
respectively. The signal from the
two
echoes
has
one level control. There is
an
external
dry
signal (not
shown)
that
goes directly from
the
input
to the
output
and
is controlled
with
the mix
parameter
(01).
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. This
algorithm
sounds
best
with
a Mix of
wet
and
dry.
03 - Vibrato Rate
Range: 00 to 99
This parameter sets the
amount
of modulation.
Higher
values create a faster vibrating rate.
04 - Vibrato Width
Range: 00 to 99
This parameter sets the
width
(adjusts the amount) of
the
modulation.
05 - Left/Right LFO
Range: Out-at-Phase or In-Phase
Controls the vibrato pitch direction of the left
and
right channels.
When
out-of-phase,
the
quadrature
pitch change
on
the left channel will lag
90
degrees from the right. When
in
phase,
both
channels will change pitch together.
ENSONIQ DP/4 Musician's Manua(
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