ARP 2600 - Further Research: Modulation Effects; VCO Substitution for Noise Source; VCA Output Variations with Waveforms

64
5.1111
FURTHER RESEARCH
VC01
or
VC03
VCA
Try
first
at
Audio
..Then
LF VCOZ
out
1)
For
the noise
generator
you
were listening
to,
substitute
one
of the VCO's
not in use-VCOl
or
VC03.
Listen first
with
the controlling
oscillator VC02
in
its
low
range, then
in its
high range.
Don't forget to
try different input
level
settings for the
linear control
input
of
the
VCA.
T
m
mm
mm *mm <mm
*%%
1
1
1
i
1
1
1^
r
->!
i
i
L. —
j
1
2)
For the sine wave voltage
substitute each of the other
three output voltage waveforms available
from
VC02. Try
this first using
the
noise
generator as signal
source; then
try
it
with the VCOI and
VC03 as sources.
With
the latter,
pay
particularly close attention
to the infinite variety of
AM effects produced by the interaction
of the signal fre-
quency and the control frequency.
Significant differences
in the
VCA output
will
be
produced
by
changing a) signal
frequency
b)
control frequency c)
control
input
level,
and
d)
initial
gain setting
of the
VCA.