Sequential prophet 5 - Amplifier

ATTACK
knob;
Adjusts the
length of
time
for the envelope
generator's output
to
go
from
zero
level
(when key is
initially depressed)
to
maximum level.
DECAY
knob:
Adjusts
the length of time
for the envelope
generator's
output
to
go
from
maximum
level to
sustain level.
SUSTAIN
knob: Adjusts the
sustain level from zero to maximum.
Remember,
this
is
a
level control,
not a
time control. (Sustain time
is the
period
between
the
end of
the
DECAY
period and the
beginning
of the RELEASE period. This
is
determined
by
touch.)
If
SUSTAIN is set at maximum then
the DECAY
knob
setting is
irrelevant,
because
there
is no level below
maximum
for the envelope to
decay to.
RELEASE knob; Adjusts the
length of time for the envelope generator's
output
to go
from
sustain level to zero.
If
the
key
is released
before
the attack or
decay
periods have
elapsed, the
RELEASE
knob controls
the time taken for the output
to drop to zero from whatever
its level
when the
key
was released.
If
the attack and
decay periods have elapsed
and SUSTAIN is
set to
0,
then the
RELEASE
setting is irrelevant,
because there
is
no
level for the
envelope
to release
from
.
NOTE:
The time
range on
the
ATTACK,
DECAY,
and
RELEASE knobs
is
approximate-
ly
1
millisecond
(1/1000 second) to 30
seconds. Since
the
generators
respond
exponen-
tially
to their
timing CV
inputs,
setting
5,
for example,
gives
a
period
of
approximate-
ly
1/2 second (rather
than 15
seconds).
Remember
that
the
FILTER
ENVELOPE AMOUNT
knob governs
the depth
of
filter
contour.
So if
ENVELOPE
AMOUNT
is set to
0,
the
envelope generator
will
have
no
effect
on the filter.
2-7
AMPLIFER
AMPLIFIER
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10
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10
ATTACK DECAY
SUSTAIN
RCLEASI
Figure
2-6
The
ATTACK,
DECAY,
SUSTAIN,
and RELEASE knobs
in this
module
shape
the
envelope
applied
to
the VCA in
the same
manner as
the corresponding
controls in the
FILTER
module.
Unless
the
SUSTAIN
knob
is somewhat
advanced,
nothing
will be
heard
after
the
ATTACK
and
DECAY
periods
have
elapsed.
2-8
CMIOOOD
2/82