ARP 2600 - Page 87

82
Here are some other possibilities; you
may want
to
diagram them
in
separate block diagrams.
1)
instead
of
gating the envelope generators from the Internal
Clock,
switch them back
to
keyboard
gating.
2)
Trigger
the S/H
from
the
keyboard.
3)
Lower the
Internal Clock
rate
to
minimum and gate the
Envelope
Generators from the keyboard.
Trigger
the S/H
from the
internal Clock. Play a tune
from the keyboard;
sooner
or later
a
changed
output voltage from the
S/H
circuit
will change the
"key"
you
are playing in.