Roland Juno-6 - Functions for Sound Creating; DCO (Digitally Controlled Oscillator)

I. Functions for
Sound Creating
DCO
(Digitally
Controlled
Oscillator)
DCO is the
digitally controlled
oscillator
that
controls the pitch and
creates
three types
of
waveforms which are the sound
source
of
the synthesizer. Compared
to VCO (Voltage
Controlled
Oscillator), DCO
has
superior
stability. The
operations
and
functions
of
the DCO are
virtually the same
as those of
the
VCO. A
DCO does not,
however,
provide
portament
function, because of
its
digitally
controlled system.
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SUB
o o o
SUBOSC
NOISE
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,
WAVEFORMS
You
can
select
the output Waveform
of
the DCO. Each
switch can be
individually
turned
on
and off
and
can
be used
with
other
switches.
(2)
PWM MODE
switch
When
it
is set to
(MAN),
pulse width
can
be
set
with
the PWM
knob
(3).
When
it is
set
to
LFO
or
ENV,
pulse
width
is controlled
by
the
corresponding
signal
from
the LFO
or the
envelope
generator.
(3)
PWM
e
Pulse
Width Modulation
When
PWM
MODE switch
(2)
is set to (MAN),
this knob controls pulse width, and
controls
the intensity of the modulation when
it is
set
to
LFO or ENV.
SUB OSC
•
Sub Oscillator
Level
It controls the
volume of the
SUB OSC.
(5)
LFO
•
LFO MODULATION
It adjusts the depth
of the
vibrato
effect
when the LFO
is
controlling the pitch
of
the
DCO.
(6)
NOISE
e
NOISE
level
It controls the volume of
the NOISE.
<Pulse Wave>
When
the
top
and
bottom portions of the
square wave are unequal,
the result
is
what
is
called
a
pulse wave. The
harmonic content of
the
pulse wave will
depend greatly on the
width of the pulses.
It is possible
to
modulate,
or change the
pulse width
by
means
of the
LFO
or the envelope
generator.