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SAMPLE/HOLD
The S/H
(Sample and
Hold) produces
voltage
sequences,
either
in
fixed patterns or
at
random,
by sampling
input
waveforms from
the
LFO.
Each sample
represents the voltage
level
at
the
instant
the
sample mas
taken.
The
HOLD
portion
of
the
circuit
holds
this
voltage
level
until
the
next sample
is
taken.
The
result
of
this
is
a
control voltage
output which changes
stepwise.
When
used
to control
a
VCO,
this
produces
arpeggio-like
runs
of
notes
or
notes
with
random
pitch patterns.
When
used
to control
the
VCF
cutoff frequency
point,
it
produces
interesting
tone
color
patterns.
These
tone
color patterns
can
also
be very
effectively
used
with
external
sound
sources
such
as
from
a
guitar
or
string synthesizer.
1.
MODE
SWITCH
This
switch
decides
which
waveform
will
be
sampled.
The
,1
and
,"\ positions
sample
waveforms from
the
LFO,
and
the
RANDOM
position
samples
the
output
of the
NOISE
GENERATOR.
2.
SAMPLE
TIME
CONTROL
This control determines the
intervals
of the
sampling
pulses.
The
sampling
rate
can
be
visually
checked by means
of the
LED
above
the
MODE
switch.
Moving
the
SAMPLE
TIME
control higher
will
produce
a faster
sampling
rate.
The
drawing
below shows
a
few
of the patterns
which
are possible
when
using the
S/H
output
to
control
a
VCO.
In
these
examples,
the
SAMPLE
TIME
rate
is
several
times
faster
than
the
rate
of the
LFO.
In
the
first
two
examples,
it
is
possible to
produce
a great variety of
musical patterns
by
varying the
frequency
of
the
sampled waveforms
(by
changing the
LFO
RATE
control)
and/or
varying the
SAMPLE
TIME.
3.
OUTPUT LAG CONTROL
Raising
this
slider
will
"soften" the voltage
changes
so that pitches
will
have
a
keyboard-
like
portamento
effect.
i
SAMPLE/HOLD
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WAVEFORM
BY EACH SAMPLING
MODE.
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WAVEFORM
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16
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