Roland SH-1 - PARTS IDENTIFICATION; External Components

VCF
-
VOLTAGE
CONTROLLED
FILTER
4. MOD
(Modulator)
Controiiing
the
VCF with
the
Modulator
MODE
switch at
the
[
r
\A
position
produces
effects
like
continuous
wah pedal
move-
ment.
With the
MOD
slider at
the
maxi-
mum,
growl or
flutter
effects are
produced.
With
the
RESONANCE
slider at
the
lower
position,
tremolo
effects
are
produced,
which is a
slight
varying
of the
loudness.
With
the
Modulator
MODE
switch
at
RANDOM,
the
VCF
response
varies
stepwise to
produce
very
interesting
tone
color
changes
which are
useful
for
proces-
sing noise
or
external
signals.
5.
KYBD
CONTROL
This
control
allows
control
of the
VCF
cutoff
point by
means of
the
keyboard
control
voltage.
The
tone
color
of
many
instruments
will change
with pitch;
this
effect
can be
produced
by
means
of
keyboard
control
voltage
control
of the
VCF
cutoff point.
When the
siider is
set at
maximum,
the
VCF cutoff
frequency
will
change at
the
rate of
1 volt/1
octave,
and
the
VCF CUTOFF
FREQ control
will
have to
be set a
little
lowe-
than it
would
be
without
keyboard
contro
6.
EXTSIG
ENV
FOL'R
{ENVELOPE
FOLLOWER)
CONTROL
This
control
will
allow the
VCF
cutoff
point
to
follow the
level
of an
externa!
audio
signal.
To get
effective
wah
effects,
keep
the
external
signal
level so
that the
overload
indicator
goes
on at
the
peak
volume.
The best
wah effects
are
obtained
with
instruments
whose
sounds
decay
slowly,
such as
guitars
and pianos.
It is
also
inter-
esting
when
used
with
wind
instruments
and the
human
voice.
See
pages 47
and
48.
CONTROL
VOLTAGES
ON
VCF
*^V-
1
BENDER
H
Cut
Off
Resonance
Freq.
CONTROL
OF
VCF
BY
KYBD-CV
III
II
III
II
III
Filter
characteristics
changes
with
pitch.
KYBD-CV
i
at
maximum
KYBD-CV
'
Filt8r
characteristics
are
constant
without
regard
to
sound
pitch.
J
at
minimum
_j
*-
CONTROL
OF
VCF
BY
ENVELOPE
FOLLOWER
OVERLOAD
EXTERNAL
INPUT
o
EXTERNAL
SIGNAL
Envelope
Follower
EXAMPLE
OF
SETTING TO
USE
ENVELOPE FOLLOWER
AUDIO
MIXER
O to"'
vcd osc
must sc
HPF
euro"
>n
ENV-2
.
»
—
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— .
DI
=
I'
VCA
HOID
=
I-
D
—
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17