Section 2 - Getting Started
Understanding the DP/4
20
This
part
of the
manual
provides
an
overview of the theory
and
operation of the DP
/4.
We'll
start
by
discussing the
make-up
of the DP
/4
and
its component parts; then
we'll
define
some
terms
you
should
familiarize yourself with; finally we'll see
how
they all fit together into a
coherent whole.
Let's
begin
by
getting
an
idea of
the
component
parts that make
up
the DP /
4.
Picture a rack of
equipment
containing the following:
• 4 state-of-the-art effects processors (we'll call them A,
B,
C,
and
D),
• a
patch
bay
to route the
input
signals to the four units,
and
to connect
them
together
in
almost
any
configuration,
and
• a
mixer
for combining
and
adjusting the
output
levels of the four units.
4 Digital Effects
Processors
Effects Unit A
Effects Unit
C
Patch Bay for connecting units
in
different configurations
Sub-mixer for blending the
outputs of the 4 units
Effects Unit B
Effects Unit D
Mixer
Now
suppose
you
could change the effect
in
all four units, repatch the
patch
bay
into a
whole
new
setup,
and
adjust the levels
on
your
sub-mixer, all with the press of a
button
(or
with
a MIDI
program
change,
or
a press of the foot switch). That's the DP
/4.
Of
course,
the
DP
/ 4 does
have
certain advantages over the rig
shown
above. For example, all of
this is
integrated
into a single box.
And
the patching between effects units
and
the mixing
of
their
output
signals is done digitally,
without
the cumulative noise
and
distortion
that
goes along
with
amplifying
and
mixing analog signals.
Also,
unlike
the
four separate units above, the four signal processors in the DP
/4
can be
"ganged,"
two
or
four
at
a time, to
produce
effects which require more processing
power
than
a
single
unit
can
handle. The 2 Unit Pitch Shifter is
an
example of such
an
effect.
ENSONIQ DP/4 Musician's Manual
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