ARP 2600 - Page 86

81
5.1401
An
alternative
form of 5.14
,
in
which two
parallel signal
paths
feed
the
VCF
and VCA respectively
before
being
mixed.
With
proper control settings,
the
2600
output
will
be a
sequence
of
notes at
random pitches,
following one
another
at
a
rate
determined by the
Internal Clock.
Begin with these
control
settings
and
then
vary them
systematically :
1)
VCF and VCA
initial
frequency and
gain
at
minimum,
proper control imputs
at maximum.
2)
Envelope
Generators' gating switch
to lower
position.
3)
VCO's in
audio
range, about
500Hz; S/H-oscillator
inputs
about
two-thirds
open.
4)
Internal Clock
rate about
medium; S/H input
level all the
way
open, and
NG
output
level about three-quarters up,
color
hardly
matters.