Behringer ABACUS - CHANNEL 1 FALL TIME

12 13Quick Start Guide
ABACUS
ABACUS Controls
(12) CHANNEL 2 ATTENUVERTER –
Use this control to attenuate
(CW) or invert (CCW) voltages
fed to Channel 2 input on socket
3 or the internally generated
voltage in the range -10 V to
+ 10 V.
(13) CHANNEL 3 ATTENUVERTER –
Use this control to attenuate
(CW) or invert (CCW) voltages
fed to Channel 3 input on socket
4 or the internally generated
voltage in the range -5 V to
+ 6 V.
(14) CHANNEL 4 BOTH CV INPUT –
Accepts a voltage in the range
+/- 8 V. A positive voltage will
exponentially decrease the
total Rise/Fall time, until the
minimum is reached; a negative
voltage exponentially increases
it until it reaches maximum.
(15) CHANNEL 1 FALL CV INPUT –
Allows CV control of the Fall
function, in conjunction with
control 16. Accepts voltages
in the range +/- 8 V. Positive
voltages increase the Fall time
until the maximum is achieved;
negative voltages decrease it
until it reaches minimum.
(16) CHANNEL 1 FALL TIME –
Use this control to set the
Fall time. See table below for
maximum times according
to dierent settings. Can be
modulated further by feeding
a CV to socket 15.
(17) CHANNEL 4 FALL TIME –
Use this control to set the
Fall time. See table below for
maximum times according
to dierent settings. Can be
modulated further by feeding
a CV to socket 18.
(18) CHANNEL 4 FALL CV INPUT –
Allows CV control of the Fall
function, in conjunction with
control 16. Accepts voltages
in the range +/- 8 V. Positive
voltages increase the Fall time
until the maximum is achieved;
negative voltages decrease it
until it reaches minimum.
(19) CHANNEL 1 CYCLE TRIGGER –
Allows an external positive
going gate or trigger of +2.5 V
or more to trigger Channel 1’s
Cycle function.
(20) CHANNEL 1 ATTENUVERTER –
Use this control to attenuate
(CW) or invert (CCW) the
output of Channel 1 after
Rise/Fall processing. Does not
pass internal voltage unless
processing is taking place.
(21) CHANNEL 4 ATTENUVERTER –
Use this control to attenuate
(CW) or invert (CCW) the
output of Channel 1 after
Rise/Fall processing. Does not
pass internal voltage unless
processing is taking place.
(22) CHANNEL 4 CYCLE TRIGGER –
Allows an external positive
going gate or trigger of +2.5 V
or more to trigger Channel 4’s
Cycle function.
(23) CHANNEL 1 RESPONSE –
Use this control to vary the
response of Channel 1 from
logarithmic through linear to
exponential. See table below.
(24) CHANNEL 4 RESPONSE –
Use this control to vary the
response of Channel 4 from
logarithmic through linear
to exponential. See table below.
(25) CHANNEL 1 CYCLE – Use this
button to initiate cycling of
Channel 1; Rise and Fall will
cycle until button is pressed
again to stop the cycle. Button
is illuminated when cycling.
Button ashes when Cycle is
externally triggered via socket
19. Internal Cycle takes priority
over external trigger.
(26) CHANNEL 1 OUTPUT –
Outputs the processed voltage
from Channel 1.
(27) CHANNEL 2 OUTPUT –
Outputs the processed voltage
from Channel 2.
(28) CHANNEL 3 OUTPUT –
Outputs the processed voltage
from Channel 3.
(29) CHANNEL 4 OUTPUT –
Outputs the processed voltage
from Channel 4.
(30) CHANNEL 4 CYCLE – Use this
button to initiate cycling of
Channel 4; Rise and Fall will
cycle until button is pressed
again to stop the cycle.
Button is illuminated when
cycling. Button ashes when
Cycle is externally triggered via
socket 22. Internal cycle takes
priority over external trigger.
(31) CHANNEL 1 END OF
RISE OUTPUT – Outputs a
+ 9 V voltage at the top of the
Rise function, indicated by the
associated LED, which continues
active until the end of the
Fall cycle.
(32) CHANNEL 1 UNITY OUTPUT –
Outputs a 0 - +10 V voltage
following the Rise/Fall
functions when Channel 1 is
cycling; otherwise follows the
channel input unaected by the
attenuverter. LED shows green
for a positive voltage, red for a
negative one.