Roland SH-1 Instruction Manual

VCO
-
VOLTAGE
CONTROLLED
OSCILLATOR
VCO (Voltage
Controlled
Oscillator)
The
VCO
is
the primary
sound source
of
the
synthesizer and
generates the basic
waveforms.
The frequency or
pitch of
these
waveforms is
controlied
by
a
controi
voltage.
VCO CONTROL
VOLTAGE INPUTS
The
most important
control of VCO
pitch
is by means of
the keyboard
control voltage
and the BENDER
controi voltage.
The
keyboard
control voltage is
internally
connected
to
the VCO.
The
BENDER
control
voltage is connected
through the
BENDER
SENSITIVITY control.
Other sources of control
voltage for
control of the VCO
are: MOD
(Modulator)
and
AUTOBEND voltage, and the
S/H.
Each of these
may be fed to
the VCO in
the
amounts needed to
produce
the desired
effects.
1.
MOD (Modulator or LFO)
With the MOD
slider
at
high
position, the
VCO is
modulated
by
the output
signals
of
Modulator. The VCO
pitch will vary
as
shown in
(1), (2),
and
(3)
at
the right,
depending on the
setting of the
Modulator
MODE switch.
(1)
Pitch varies
continuously to
give
vibrato effects.
(2)
Pitch varies as
in
a
trill.
(3)
Pitch varies
irregularly to give
random
notes.
2.
AUTOBEND DEPTH
This
controi adds a
change of pitch at
the
beginning of each note played. By
raising
this
control, the
VCO pitch is
controlled
by a
voltage envelope
as shown in
(4)
so
that the
sound starts with a
lower
pitch.
The
human voice,
whistling,
and
other
sound sources
which begin on
tower pitches
will sound
more real
and natural
using this.
3.
AUTOBEND TIME
This
controls the
time required
for the
VCO to return to
its normal
pitch
when
using
the AUTOBEND.
Raising the
slider
increases the time.
Normally,
this slider
is
set between
and
5;
special effects
are
obtained with
higher settings.
(1)MOD(^)
8
PITCH
TIME
(2)MOD.(n_l)
h
—
PITCH
\>
TIME
(3)MOD.(Random)
h
PITCH
TIME
(4)AUTOBEND
-*
p
CHANGE OF PITCH

Roland SH-1 Specifications

General

Brand	Roland
Model	SH-1
Category	Synthesizer
Language	English