Roland SH-09 - Envelope Attack Time; Envelope Decay Time; Envelope Sustain Level; Envelope Release Time

(Attack
Time)
The
Attack slider controls the amount of
time
required for
the Envelope voltage
to reach
its max-
imum
level
after
a
key
is
pressed. This
Attack time
is virtually
instantaneous with
the slider
at
'0'
and
lengthens
as
the slider is raised.
D
(Decay
Time)
The
Decay
slider controls
the amount of
time
required for
the voltage to
fall
from its
level
at the
end of
the Attack time to the level
set
by
the Sus-
tain control.
Again,
Decay
time is
virtually instan-
taneous
with the slider
at
'0'
and
lengthens
as
the
slider
is raised.
(Sustain Level)
This
control
determines the level
to which the
voltage
will
fall
at the end of the
Decay time.
Once
this level
is
reached it will
be held until
the key is
released. A
Sustain level of
"0'
will
Decay
to
and
hold
at silence,
effectively
cancelling
Sustain. A
Sustain level of
'10'
will
not Decay,
but will remain
at
'10',
effectively
cancelling
Decay.
Sustain levels
between these
extremes
combine with
the various
Decay times
a
available
to subtly
shape notes
as
they are
held.
R
(Release
Time)
This slider
determines the amount
of time
required
for
the voltage
to
fall
to
minimum
level
after
the
release
of
the key. The
Release will
begin
at any
time within
the Attack,
Decay or
Sustain
sections of
the Envelope
as instructed from
the
keyboard.
Keyboard Control
Functions
The
keyboard
of the SH-09 provides
three control
functions:
the
Keyboard Control
Voltage,
Keyboard
Gate and
Keyboard Trigger. These are
internally
hardwired,
sometimes appearing as
a
selectable
control and
others providing a constant control
function.
Keyboard Control
Voltage
(KCV)
The
Keyboard
Control Voltage is permanently
wired
to the VCO
and VCF for precise control
of pitch
and
tone in relation
to
the
keys played on the
keyboard.
Keyboard
Gate
The
Keyboard
Gate is an on/off switching
function
used
to
signal
the
Modulator for
Delayed
sine wave
output as a preset
Envelope
choice for
the VCA
and/or
to initiate Envelope
events. Both
the KCV
and
Keyboard
Gate are
available
as inputs
and
outputs for
interfacing
on the
back panel
of the
SH-09.
Keyboard Trigger
The
Keyboard Trigger
is
a
voltage
spike
appearing
for
an instant
at the initial
pressing of
a
key.
It is
used
in
conjunction with
the
Keyboard
Gate to pro-
vide
one of the control
organs for
initiating
Envelope
events.