Vcf; Filter) - Roland SH-3 Instruction Manual

VCF
o
VIBRATO
By
shifting
the
VIBRATO
knob, depth
is
changed and normal
vibrato can be
modulated
by
the
(</
V
wave form. However,
if it is
modulated
by other
wave
forms,
special
vibrato effects can
be produced. Vibrato
speed can be changed
by
shifting
the
RATE
knob
for
LFO.
Pitch,
Portamento and
Glide of
VCO
can
be controlled by
VCO
MANUAL
CONTROL.
(See
Fig. 4).
o
PITCH
The PITCH
dial
can vary the musical
interval
by
perfect
fifth.
o
GLIDE
When
pushing
the
GLIDE
button
while
playing,
the musical
interval drops,
and
as
soon
as
the button
is
released, the musical
interval
is
gradually
restored.
This
produces
a
Hawaiian
guitar effect.
o
PORTAMENTO
The
PORTAMENTO
effect
is
obtained by
turning the
PORTAMENTO
dial.
When
using
PORTAMENTO
effect,
one note
drifts to
the subsequent
note.
This changing speed
is
adjusted
by
this dial.
When
stopping
PORTAMENTO
tempo-
rarily,
depress the
"OFF"
button.
c)
VCF
(Voltage Controlled
Filter)
The
VCF
of the
SH-3
controls Cut-off
Frequency and Resonance.
As shown
in
Figure
5,
the
Cut-off
Frequency
control
has the function of
cutting off the high
frequency
part
of the
harmonics and
plays an important
role
in
tone production.
Note
that over-cutting of the harmonics
will
cause elimination of the
basic
frequency,
and
the
sound
will
not be produced. The
Resonance
control emphasizes the harmonics,
producing
a
peak
slightly
under
the Cut-off
Frequency.
Since over-emphasizing the peak
causes
oscillation
of the other frequency
for the
key
depressed,
it
becomes
an interruption
in
the
performance
of
melody except where
special
effect
is
desired.
Fig.
4
""
5
5
b PITCH
it
10
PORTAMENTO
L
(3D"
O
O
TRANSPOSE"
GLIDE
OFF
VCO
MANUAL CONTROL
Fig.
5
SENS
HIGH
MAX
cutoff freq
resonance
Voltage
Controlled
Filter
6