Behringer 2500 Series User manual

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CONTENTS
-Power Connection!
-Installation!
-Dual Envelope Generator Module 1003!
-Oscillator Module 1004!
-Modamp Module 1005!
-Filtamp Module 1006!
-Dual Noise / Random Voltage Generator Module 1016!
-Clocked Sequential Control Module 1027!
-Dual Envelope Generator Module 1033!
-Sample & Hold / Random Voltage Module 1036!
-Multimode Filter / Resonator Module 1047!
-Mix-Sequencer Module 1050!

Power Connection
!
The unit comes with the required power cable for connecting to a standard Eurorack power supply system. Follow these steps to
connect power to the module. It is easier to make these connections before the module has been mounted into a rack case. !
1. Turn the power supply or rack case power offand disconnect the power cable. !
2. Insert the 16-pin connector on the power cable into the socket on the power supply or rack case. The connector has a tab that will
align with the gap in the socket, so it cannot be inserted incorrectly. If the power supply does not have a keyed socket, be sure to
orient pin 1 (-12 V) with the red stripe on the cable. !
3. Insert the 10-pin connector into the socket on the back of the module. The connector has a tab that will align with the socket for
correct orientation. !
4. After both ends of the power cable have been securely attached, you may mount the module in a case and turn on the power
supply. #
Connect end P1 to the module socket!
Connect end P2 to the power supply

Installation
The necessary screws are included with the module for mounting in a Eurorack case. Connect the power cable before mounting. !
Depending on the rack case, there may be a series of fixed holes spaced 2 HP apart along the length of the case, or a track that allows
individual threaded plates to slide along the length#
of the case. The free-moving threaded plates allow precise positioning of the module, but each plate should be positioned in the
approximate relation to the mounting holes in your module before attaching the screws. !
Hold the module against the Eurorack rails so that each of the mounting holes are aligned with a threaded rail or threaded plate. Attach
the screws part way to start, which will allow#
small adjustments to the positioning while you get them all aligned. After the final position has been established, tighten the screws
down. !

DUAL ENVELOPE GENERATOR MODULE 1003

Controls
1. ATTACK TIME -Adjusts the rate at
which the envelope reaches its
peak voltage.!
2. SIGNAL LED - Indicates when a
gate signal is present.!
3. INITIAL DECAY TIME - Adjusts the
rate at which the envelope decays
from its peak to its designated
sustain level.!
4. SUSTAIN LEVEL - Controls the
level at which the envelope remains
after its peak but before release,
sustaining as Long as the input
signal is present or the manual gate
button is held down.!
5. FINAL DECAY TIME - Controls
how quickly the envelope falls after
the input signal stops or the manual
gate button is released. !
6. TRIGGER MODE - Selects
between single mode, where only
the gate signal controls the
envelope, or multiple mode, which
uses a positive trigger pulse to re-
trigger the envelope while a gate
signal is present.!
7. MANUAL GATE - Press and hold to
start the envelope cycle.!
Patchpoints
8. GATE - Connect a gate signal to
control the envelope cycle.!
9. TRIG- Triggers a new attack of the
envelope if a gate signal is also
present.!
10. OUT L - Send the left envelope
positive and negatieve control
voltage to other modules via
3.5 mm TS cable.!
11. OUT R - Send the right envelope
positive and negatieve control
voltage to other modules via
3.5 mm TS cable.

OSCILLATOR MODULE 1004
!

Controls
1. COARSE FREQUENCY - Sets the
frequency from 0.03 to 32 Hz in the
low (LFO) range, or from 15,5 Hz to
16 kHz in the high (audio) range,
depending on the Fine frequency
knob setting.!
2. FINE FREQUENCY - Adjusts the
frequency by a factor of ±1 octave,
potentially halving or doubling the
frequency at either extreme. !
3. ENABLE switch - Turns the oscillator
on and off.!
4. RANGE switch - Determines
whether the oscillator operates in the
low (subsonic/LFO) band or the high
(audio) band. !
5. WAVEFORM switches - Engage up
to 5 waveforms by moving the
relevant toggle switch to the left, or
engage the inverse waveform by
moving the switch to the right.
The center position turns the
waveform off. Engaging multiple
switches simultaneously produces
the average of all active waveforms.!
6. PW knob - Manually control the
pulse width for the pulse waveform.!
7. FM 2 knob - Attenuates the signal
connected to the FM 2 input.!
8. PWM knob - Adjusts the modulation
depth of the PWM control input.!
9. FM 1 knob - Attenuates the signal
connected to the FM 1 input.!
Patchpoints!
10. KYBD - Connect a keyboard or other
external frequency control via a
3,5 mm TS cable.!
11. FM 1/2 - Connect external voltages
to modulate the frequency.!
12. PWM - Connect an external voltage
to modulate the pulse width.!
13. OUT - Send the oscillator signal
other modules via 3,5 mm TS cable.

MODAMP MODULE 1005

Controls
1. AMPLIFIER GAIN - This knob
controls the VCA’s gain and final
output volume at the OUT jack.!
2. UNMOD GAIN - This knob controls
the IN A signal gain when the module
is in UNMOD mode (as indicated by
the UNMOD button).
UNMOD mode allows the module to
be used as a VCA when modulation
is not required. !
3. AMPLIFIER CONTROL MODE
(EXP’L/LINEAR) - This sliding switch
determines whether the VCA gain
response is exponential (EXP’L) or
linear (LINEAR).!
4. UNMOD - Press this button to place
the module into UNMOD mode.
In UNMOD mode, the IN A signal
passes to the OUT jack without any
modulation, and the signal level is
controlled by both the UNMOD GAIN
and AMPLIFIER GAIN knobs. IN B
does not function in UNMOD mode.!
5. MOD - Press the button to activate
MOD mode. In MOD mode, the
circuit combines the IN A signal and
the IN B signal to produce an output
signal that is a modulated
combination of the two input signals.!
6. RATIO - Use this knob in MOD mode
to offset the tune control voltage that
is sent out through the CV B jack.
This function only operates when
MOD mode is selected. !
7. TUNE - Use this knob in MOD mode
to control the output level of the tune
control voltage sent out through both
the CV A and CV B jacks.
This function only operates when
MOD mode is selected. !
8. IN A - This knob controls the input
level for the signal coming in through
the IN A jack.!
9. IN B - This knob controls the input
level for the signal coming in through
the IN B jack.!
Patchpoints!
10. IN A / IN B - Use these input jack to
route in audio signals for the internal
modulation process via cables with
3.5 mm connectors. !
11. CV A / CV B - Use these jacks to
route TUNE (CV A and CV B) and
RATIO (CV B offset) control voltages
out to the two VCOs that typically
supply the audio signals to the IN A
and IN B inputs to be modulated.!
12. CV IN - Use this jack to route in
control voltages signals for remote
control of the AMPLIFIER GAIN
setting.!
13. MOD - Use this jack to route in a
trigger signal to remotely activate
MOD via a cable with 3.5 mm
connectors.!
14. GATE - Use this input jack to route in
a gate signal to turn the modulation
circuit on and offvia a cable with
3.5 mm connectors.!
15. UNMOD - Use this jack to route in a
trigger signal to remotely switch off
MOD mode via a cable with 3.5 mm
connectors. !
16. OUT - This jack sends out the final
VCA signal via a cable with 3.5 mm
connectors.

FILTAMP MODULE 1006

Controls
1. FILTER - Adjusts the cutoff
frequency of the filter.!
2. FILTER RESONANCE - Boosts the
resonance frequencies selected with
the Filter knob, potentially causing
VCF oscillation. !
3. AMPLIFIER GAIN - Controls the
level of the VCA.!
4. KEYBOARD knob - Attenuate the
voltage connected to the KYBD
input, which controls the cutoff
frequency of the filter. !
5. IN B knob - Adjusts the level of the
signal connected to the IN B input.!
6. CV 2 to VCF knob - Attenuate the
voltage that is passed from the CV 2
input to the VCF.!
7. IN A knob - Adjusts the level of the
signal connected to the IN A input.!
8. CV 1 to VCF knob - Attenuate the
voltage that is passed from the CV 1
input to the VCF.!
9. EXPONENTIAL/LINEAR switch -
Select between a linear or more
natural exponential VCA response.!
10. CV 2 to VCA knob - Attenuate the
voltage that is passed from the CV 2
input to the VCA.!
11. CV 1 to VCA knob - Attenuate the
voltage that is passed from the CV 1
input to the VCA.!
Patchpoints!
12. IN A - Connect an input signal via
3.5 mm TS cable.!
13. IN B - Connect an input signal via
3.5 mm TS cable.!
14. KYBD - Connect a voltage that can
be used to control the VCF
frequency.!
15. CV 1 - Connect a voltage that can be
used to control the VCF frequency or
VCA level.!
16. CV 2 - Connect a voltage that can be
used to control the VCF frequency or
VCA level.!
17. OUT - Send the processed signal to
other modules via 3.5 mm TS cable.

DUAL NOISE / RANDOM VOLTAGE GENERATOR MODULE 1016
!

Controls
1. LEDs - Indicate whether the
associated knob is active. !
2. NOISE knob - Attenuates the output
of the noise generator!
3. SLOW RANDOM knob - Attenuates
the output of the slow random
voltage generator. !
4. WHITE/PINK/OFF switch - Selects
between white or pink noise or,
disengage the output. !
5. OFF/ON switch - Engages or
disengages the slow random voltage
generator. !
Patchpoints!
6. NOISE A/B - Send the noise A and B
signals to other modules via 3.5 mm
TS cable. !
7. RANDOM A/B - Send the random
voltage signals to other modules via
3.5 mm TS cable.

CLOCKED SEQUENTIAL CONTROL MODULE 1027

Controls
1. CH A / CH B / CH C SEQUENTIAL
COLUMNS - Use the knobs to set the
control voltage output for each step. Each
column sends out control voltages via
that channel’s respective CH A / CH B /
CH C output jack.!
2. STEP LEDs - Each LED lights to indicate
its respective sequencer step is active. !
3. POSITION GATES - Each of these output
jacks sends out a gate signal for its
respective sequence step via cables with
3.5 mm TS connectors. These 8 gate
outputs signals are also available via the
12-pin GATE OUT LINK CONNECTOR
located on the modules underside. This
12-pin connector cab connect to and
trigger other compatible modules, such
as the MIX-SEQUENCER MODULE 1050,
via a 12-pin ribbon connector.!
4. RATE - This knob controls the step speed
at which the sequencer moves from step
to step. The knob operates in two overall
frequency ranges determined by the
LOW/HIGH switch.!
5. LOW/HIGH - Use this sliding switch to
set whether the RATE knob operates in a
lower-frequency (LOW) or higher-
frequency (HIGH) range.!
6. % PULSE WIDTH - Select between
settings for the rectangular waveform
ranging from 5% to 95% duty cycle. The
PULSE WIDTH control operates on the
CLK OUT jack only, making this control
very useful for triggering other modules
such as envelope generators, and so on. !
7. IN/EXT - Use this switch to select
between (INT) or external (EXT) pulse
width control voltage. When EXT is
selected the % PULSE WIDTH control
knob is disabled. !
8. ON/OFF - This button starts or stops the
sequence with a manual button push.!
9. STEP - Press this button to manually
progress to the next sequence step. !
10. RESET - Press this button to manually
restart the sequence at step 1. !
Patchpoints!
11. STEP - Use this jack to route external
trigger signals for the STEP button into
the module via cables with 3.5 mm
TS connectors.!
12. RESET - Use this jack to route external
trigger signals for the RESET button into
the module via cables with 3.5 mm TS
connectors.!
13. ON - Use this jack to route external
trigger signals to enable the step counter
into the module via cables with 3.5 mm
TS connectors.!
14. OFF - Use this jack to route external
trigger signals to disable the step counter
into the module via cables with 3.5 mm
TS connectors.!
15. RATE - Use this jack to route in external
control voltage signals for the
sequencer’s step speed (usually
controlled by the RATE knob) via cables
with 3.5 mm TS connectors.!
16. WIDTH - This jack allows control voltage
and modulation signals for the rectangular
waveform to be routed in via cables with
3.5 mm TS connectors.!
17. CH A - This jack sends out control
voltage signals for the CH A sequencer
column via cables with 3.5. mm
connectors.!
18. CH B - This jack sends out control
voltage signals for the CH B sequencer
column via cables with 3.5. mm
connectors.!
19. CH C - This jack sends out control
voltage signals for the CH C sequencer
column via cables with 3.5. mm
connectors.!
20. CLK OUT - Use this jack to export the
internally generated clock signal via
cables with 3.5 mm TS connectors. The
internal clock produces a gate pulse
every time the sequencer steps, and the
gate pulse’s width can be adjusted using

DUAL ENVELOPE GENERATOR MODULE 1033

Controls
1. GATE DELAY - Delays the envelope
cycle up to 3 seconds from the initial
gate input. !
2. SIGNAL LED - Indicates when a gate
signal is present.!
3. ATTACK TIME -Adjusts the rate at
which the envelope reaches its peak
voltage.!
4. NITIAL DECAY TIME - Adjusts the
rate at which the envelope decays
from its peak to its designated
sustain level.!
5. SUSTAIN LEVEL - Controls the level
at which the envelope remains after
its peak but before release,
sustaining as Long as the input signal
is present or the manual gate button
is held down.!
6. FINAL DECAY TIME - Controls how
quickly the envelope falls after the
input signal stops or the manual gate
button is released. !
7. TRIGGER MODE - Selects between
single mode, where only the gate
signal controls the envelope, or
multiple mode, which uses a positive
trigger pulse to re-trigger the
envelope while a gate signal is
present.!
8. MANUAL GATE - Press and hold to
start the envelope cycle.!
Patchpoints!
9. GATE - Connect a gate signal to
control the envelope cycle.!
10. TRIG- Triggers a new attack of the
envelope if a gate signal is also
present.!
11. OUT L - Send the left envelope
positive and negatieve control
voltage to other modules via 3.5 mm
TS cable.!
12. OUT R - Send the right envelope
positive and negatieve control
voltage to other modules via 3.5 mm
TS cable.

SAMPLE & HOLD / RANDOM VOLTAGE MODULE 1036
!

Controls
1. LED - Indicates that clock A or B is
engaged. !
2. CLOCK FREQ - Sets the clock
frequency value.!
3. CLOCK RANGE - Determines
whether the value selected with the
associated Clock Frequency knob is
interpreted by a factor of 1/10th or
x10. For example, a setting of 50 on
the knob will either result in 5 Hz or
500 Hz.!
4. SAMPLE - Manually generate a
sample command pulse.!
5. CLOCK ON/OFF - Engage clock A
and B pulse generators
independently. Clock A can be
assigned to both sample and hold
sections if desired. !
6. TRIG/GATE - Determines whether a
short trigger or longer gate will open
te sampler. In the trigger position, the
positive edge of the pulse will open
the sampler for about 10 ms, whereas
the gate position will hold the output
of the sampler open for the entire
duration of the positive pulse.!
7. INT RANDOM SIG - Adjusts the level
of the internal random signal
generator, which can be used instead
of or in addition to an external signal.!
8. EXT SIG - Attenuates the signal
connected to the EXT IN jack.!
9. CLOCK FREQ MOD - Attenuates the
signal connected to the FM IN jack.!
Patchpoints!
10. EXT IN - Connect an external voltage
which will be sampled and
manipulated.!
11. SAMPLE - Connect an external
oscillator or keyboard trigger to
generate a sample and command
pulse.!
12. FM IN - Connect a voltage to control
the clock frequency modulation of the
pulse generator.!
13. OUT - Send the sample to other
modules via 3.5 mm TS cable.