Section 4 - Algorithms
EQ - CHORUS - DDL
00
- EQ-Chorus-DDL combines
an
EQ
with
a chorus
and
a digital delay. This is
the
industry
standard
chorus effect, designed
with
very long delays to provide a
modulated
detune
effect.
This algorithm
sounds
great
with
a guitar,
but
try it
with
any
source!
EQ-Chorus-DDL Signal Routing
Left 1
Input Level Trim
Chorus
(Delay)
Chorus
L
R
The signal enters a programmable EQ, which is preceded
by
an
input
level
trim
(parameter
16).
The signal is
then
routed to the chorus which is
heard
directly
at
the
output. There is also a
delayed
unchorused
signal (sharing the
same
delay lines)
that
is
routed
back
into
the
chorus.
There is also a second signal from
the
delay line that is
routed
to
the
right side. There
are
two
discrete echo times
tapped
out
before the chorus delay line. These are
unchorused
echoes. The
signal from the echoes are
routed
directly to the outputs. There is also a
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 the EQ-Chorus-DDL are:
01-Mix
02-Volume
See the descriptions
under
the Mix
and
Volume Parameters, found in the beginning of this
section.
03
- Chorus LFO Rate Range: 00 to 99
This parameter controls the rate of
pitch
modulation which is the chorus. To achieve chorusing,
this rate
must
be
very slow.
04 - Chorus LFO Width Range: 00 to 99
This parameter controls the excursion of pitch modulation. Since the rate is usually
very
slow,
then the
width
is usually very large.
05
- Chorus Center Range: 00 to 99
This parameter controls the
nominal
delay time of the chorus
about
which the delay
modulation
occurs. Adjusting this parameter will change the tonal character of the effect. This
delay
time
is
not
related to the regen delays or the echo delays.
ENSONIQ
DP/4
Musician's Manual 93