Behringer D Service Manual
User Manual
MODEL D
Legendary Analog Synthesizer with 3 VCOs, Classic Ladder Filter,
LFO, 16-Voice Poly Chain and Eurorack Format
2 MODEL D User Manual
Table of Contents
Thank you .......................................................................2
Important Safety Instructions ...................................... 3
Legal Disclaimer ............................................................. 3
Limited warranty ............................................................ 3
About the MODEL D ....................................................... 4
1. Introduction ............................................................... 5
2. Features ...................................................................... 5
3. Controls ...................................................................... 7
4. Overview ..................................................................12
5. Calibration................................................................ 14
6. Hook-up examples ..................................................26
7. System Exclusive Commands ..................................30
8. Eurorack Installation ............................................... 32
9. Specications ...........................................................34
10. Glossary .................................................................. 36
Thank you
Thank you very much for expressing your condence in BEHRINGER products by
purchasing the MODEL D analog synthesizer - with 3 VCOs, Classic Ladder Filter,
LFO, 16-Voice Poly Chain and Eurorack Format
3 MODEL D User Manual
9. Do not defeat the safety purpose of the polarized
20. Please keep the environmental aspects of battery
Important Safety Instructions
Terminals marked with this symbol carry
electrical current of sucient magnitude
to constitute risk of electric shock.
Use only high-quality professional speaker cables with
¼" TS or twist-locking plugs pre-installed. Allother
installation or modication should be performed only
by qualiedpersonnel.
This symbol, wherever it appears,
alertsyou to the presence of uninsulated
dangerous voltage inside the
enclosure-voltage that may be sucient to constitute a
risk ofshock.
This symbol, wherever it appears,
alertsyou to important operating and
maintenance instructions in the
accompanying literature. Please read the manual.
Caution
To reduce the risk of electric shock, donot
remove the top cover (or the rear section).
No user serviceable parts inside. Refer servicing to
qualied personnel.
Caution
To reduce the risk of re or electric shock,
do not expose this appliance to rain and
moisture. The apparatus shall not be exposed to dripping
or splashing liquids and no objects lled with liquids,
suchas vases, shall be placed on the apparatus.
Caution
These service instructions are for use
by qualied service personnel only.
Toreduce the risk of electric shock do not perform any
servicing other than that contained in the operation
instructions. Repairs have to be performed by qualied
servicepersonnel.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus
(including ampliers) that produce heat.
or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding-type plug
has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. Ifthe
provided plug does not t into your outlet, consult an
electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11. Use only attachments/accessories specied by
themanufacturer.
12. Use only with the
cart, stand, tripod, bracket,
or table specied by the
manufacturer, orsold with
the apparatus. When a cart
is used, use caution when
moving the cart/apparatus
combination to avoid
injury from tip-over.
13. Unplug this apparatus during lightning storms or
when unused for long periods of time.
14. Refer all servicing to qualied service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or plug
is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed
to rain or moisture, does not operate normally, or has
beendropped.
15. The apparatus shall be connected to a MAINS socket
outlet with a protective earthing connection.
16. Where the MAINS plug or an appliance coupler is
used as the disconnect device, the disconnect device shall
remain readily operable.
17. Correct disposal of this
product: This symbol indicates
that this product must not be
disposed of with household
waste, according to the WEEE
Directive (2012/19/EU) and
your national law. This product
should be taken to a collection center licensed for the
recycling of waste electrical and electronic equipment
(EEE). The mishandling of this type of waste could have
a possible negative impact on the environment and
human health due to potentially hazardous substances
that are generally associated with EEE. At the same time,
your cooperation in the correct disposal of this product
will contribute to the ecient use of natural resources.
For more information about where you can take your
waste equipment for recycling, please contact your local
city oce, or your household waste collection service.
18. Do not install in a conned space, such as a book
case or similar unit.
19. Do not place naked ame sources, such as lighted
candles, on the apparatus.
disposal in mind. Batteries must be disposed-of at a
battery collection point.
21. Use this apparatus in tropical and/or
moderate climates.
LEGAL DISCLAIMER
MUSIC Tribe accepts no liability for any loss
which may be suered by any person who relies
either wholly or in part upon any description,
photograph, or statement contained herein.
Technical specications, appearances and other
information are subject to change without notice.
All trademarks are the property of their respective
owners. MIDAS, KLARK TEKNIK, LAB GRUPPEN, LAKE,
TANNOY, TURBOSOUND, TC ELECTRONIC, TC HELICON,
BEHRINGER, BUGERA and COOLAUDIO are trademarks
or registered trademarks of MUSIC Group IP Ltd.
© MUSIC Group IP Ltd. 2018 All rights reserved.
LIMITED WARRANTY
For the applicable warranty terms and conditions
and additional information regarding MUSIC Tribe’s
Limited Warranty, please see complete details online at
music-group.com/warranty.
4 MODEL D User Manual
About the MODEL D
• Legendary analog synthesizer with triple VCO design allows for insanely fat
music creation
• Authentic reproduction of original “D Type” circuitry with matched
transistors and JFETs
• Ultra-high precision 0.1% Thin Film resistors and Polyphenylene Sulphide
capacitors
• Pure analog signal path based on authentic VCO, VCF and VCA designs
• 5 variable oscillator shapes with variable pulse widths for ultimate sounds
• Classic 24 dB ladder lter with resonance for legendary sound performance
• Switchable low/high pass lter mode for enhanced sound creation
• Dedicated and fully analog triangle/square wave LFO
• 16-voice Poly Chain allows combining multiple synthesizers for up to 16 voice
polyphony
• Semi-modular design requires no patching for immediate performance
• Overdrive circuit adds insane spice and edge to your sounds
• Noise generator dramatically expands waveform generation
• Complete Eurorack solution –main module can be transferred to a standard
Eurorack case
• 48 controls give you direct and real-time access to all important parameters
• External audio input for processing external sound sources
• Low and high level outputs featuring highest signal integrity signal stages
• Comprehensive MIDI implementation with MIDI channel and Voice Priority
selection
• 3-Year Warranty Program*
• Designed and engineered in the U.K.
*Warranty details can be found at music-group.com.
5 MODEL D User Manual
1. Introduction
An ultra-aordable homage to an iconic synthesizer, with all the features of the
original and then some, the BEHRINGER MODEL D lets you conjure up virtually any
monophonic sound imaginable with incredible nesse and ease.
The pure analog signal path is based on authentic VCO, VCF, VCA and ladder lter
designs in conjunction with a dedicated and fully analog triangle/ square wave
LFO. And when it comes to protection and convenience, the MODEL D can even be
mounted in a standard Eurorack, making it ideal for the studio and/or the road.
Owning a MODEL D is like having your own personal time machine, enabling you
to freely embrace the past – or shape the future!
Please read the manual carefully and keep it for future reference.
1.1 Before you get started
1.1.1 Shipment
The MODEL D was carefully packed in the factory to guarantee safe transport.
Nevertheless, we recommend that you carefully examine the packaging and
its contents for any signs of physical damage, which may have occurred during
transit.
If the unit is damaged, please do NOT return it to us, but notify
your dealer and the shipping company im mediately, otherwise
claims for damage or replacement may not be granted.
1.1.2 Initial operation
Be sure that there is enough space around the unit for cooling purposes and,
to avoid over-heating, please do not place the MODEL D on high-temperature
devices such as radiators or power amps.
WARNING: The MODEL D is supplied with a AC power adapter.
It meets the required safety standards. Do not use any other
power adapter.
WARNING: Please make sure that all units have a proper ground
connection. Foryour own safety, never remove or disable the
ground conductor from any units or AC power cords in your
system.
1.2 The product manual
This product manual is designed to give you both an overview of the MODEL D
analog synthesizer, as well as detailed information on each of the controls and
parameters. You will nd an overview of the physical control elements in the
next chapter.
1.3 Preparation
CAUTION: Remember to turn your monitors / loudspeakers on
last when powering up your system, and turn your monitors /
loudspeakers o rst when powering down your system.
2. Features
True to the Original
Great care has been taken in designing the MODEL D including the true to the
original “D Type” circuitry with its matched transistors and JFETs, ultra-high
precision 0.1% thin lm resistors and polyphenylene sulphide capacitors. This
highly-focused attention to detail is what gives the MODEL D its ultra-exible
sound shaping capability, which covers everything from super-fat bass and lead
tones, stunning eects, progressive organ sounds – and all the way out to the
otherworldly sounds of your imagination.
Big, Fat Tones
The inspired synthesizer tracks laid down in the 1970s and '80s are etched in the
annals of progressive rock, wave and synth-pop music forever, making them
truly classic in every sense of the word. MODEL D’s pure analog signal path with
legendary VCO, VCF and VCA circuits, lets you recreate all of that magic – or
design incredibly fat and original sounds that will make you a legend in your own
right!
VCO Triple Play
MODEL D’s 3 highly-exible Voltage Controlled Oscillators (VCOs) provide an
incredible range of 5 waveforms for sculpting the perfect sound. Oscillators 1 and
2 options include: triangular; triangular/saw; saw; square; wide pulse; and narrow
pulse, while OSC 3 features: triangular; reverse saw; saw; square; wide pulse; and
narrow pulse. Additionally, all 3 VCOs can be adjusted across an extremely-wide,
6-octave range (LO, 32', 16', 8', 4', and 2'). This amazing exibility gives you all the
tools you need to be your creative best.
24 dB Ladder Filter and VCA
The very heart of MODEL D’s sound is its highly-exible 24 dB Ladder Filter, which
lets you freely experiment with the Cuto Frequency, Emphasis, and Contour to
dial in the perfect sound.
MODEL D’s Filter Mode switch can be set to either Lo- or Hi-pass for selecting the
range of your choice. You can also adjust the Attack, Decay, and Sustain controls
to aect the cuto frequency with time. The VCA Decay switch lets you set the
length of time the note lingers after the key has been released. Additionally,
support for lter-keytracking allows you to select how much ltering is applied
based on the note being played. And if you want to add modulation, just set the
Filter Modulation switch to the On position and use the Controllers Mod Mix knob
to make it so. The VCA can even be overloaded via MODEL D’s feedback circuit to
add insane spice and edge to your sounds – without saying "goodbye" to your
precious low-end content.
Making Waves
You are always in complete control of MODEL D’s onboard modulators, which
feature: adjustable Tune; Mod Depth; LFO Rate; Glide (portamento); and Mod Mix
knobs. A range of switches is provided for selecting bet ween: triangle or square
wave oscillation; modulation On or O; OSC 3 or Filter EG (Filter Envelope); and
Noise (Mod SRC) or LFO. The Tune knob is used to adjust the frequency of OSC 1,
2 and 3 (as long as the OSC 3 switch is turned o). The internal Noise generator,
which is switchable between either Pink or White noise for dramatically
expanded waveform generation, is the default modulation source, unless an
external Mod Source is connected at the 3.5 mm input jack. The BEHRINGER
MODEL D is the ultimate mono, all-analog synthesizer in its class – especially
when it comes to sound quality, versatility and aordability.
6 MODEL D User Manual
16-Note Poly Chain Ready
While it is a monophonic instrument (one note at a time), MODEL D’s 16-note
Poly Chain function lets you combine multiple synthesizers for up to 16-voice
polyphony – plus it provides vastly improved reliability and stability over its
1970s and '80s predecessors.
Semi-Modular Design
Designed around an intuitively-linear workow, MODEL D benets greatly
from its semi-modular design, which requires no patching for immediate
performance. Just connect your favorite keyboard or computer via MIDI over DIN
or USB – and start exploring the world of analog music synthesis right out-ofthe-box.
Eurorack Ready
Designed to handle the rigors of life on the road or in the studio, your MODEL D
can easily be transferred into a standard Eurorack case for the perfec t integration
into your existing system.
Controls and Connectivity
The MODEL D has 29 knobs and 19 switches, all laid out in a highly-intuitive
format that puts the joy back into your music creation.
Input and output connections include: MIDI I/O and Thru over USB/MIDI DIN;
modulation and audio inputs; OSC1 frequency control; external control of lter
cuto, resonance and contour; Main Out – and Phones, with its own dedicated
Volume control.
Unleash Your Imagination
When it comes to not just pushing envelopes but creating them, MODEL D
gives your imagination its voice – and it’s so very aordable. When modern
performance calls for classic analog sound – it calls for the BEHRINGER MODEL D!
You Are Covered
We always strive to provide the best possible Customer Experience. Our products
are made in our own MUSIC Tribe factory using state-of-the-art automation,
enhanced production workows and quality assurance labs with the most
sophisticated test equipment available in the world. As a result, we have one of
the lowest product failure rates in the industry, and we condently back it up
with a generous Warranty program.
7 MODEL D User Manual
3. Controls
3.1 Top Controls
(1)
(2) (3) (17)
(18) (26) (27)
(28) (29)(19)
(6)
(5)
(4)
(7)
(8)
(9)
(10) (11) (12) (13) (14) (15) (16) (20) (21) (22)
(37) (38) (39) (40)
(41)
(48)
(49)
(33)
(32)
(36)
(44)
(43)
(31)
(35)
(42)
(25)
(24)
(23)
(47)
(30)
(34)
(45)
(46)
8 MODEL D User Manual
(17)
(18) (26) (27)
(28) (29)(19)
(1)
(2) (3) (17)
(13) (14) (15) (16) (20) (21) (22)
(24)
(25)
(23)
(18) (26) (27)
(28) (29)(19)
3.1.1 MIDI Section
(1)
(1) USB PORT - this USB type B jack allows connection to a computer. The
MODEL D will show up as a class-compliant USB MIDI device, capable of
supporting MIDI in and out.
USB MIDI IN - accepts incoming MIDI data from an application.
USB MIDI OUT - sends MIDI data to an application.
(2) MIDI IN - this 5-pin DIN jack receives MIDI data from an external source.
This will commonly be a MIDI keyboard, an external hardware sequencer,
a computer equipped with a MIDI interface, etc.
(3) MIDI THRU - this 5-pin DIN jack is used to pass through MIDI data
received at the MIDI INPUT. This will commonly be sent to another
MODEL D synthesizer to run a Poly Chain or to a drum machine assigned to
a dierent MIDI Channel.
(2) (3)
3.1.2 Controllers Section
(6)
(5)
(4)
(7)
(8)
(9)
(10) (11) (12)
(4) OSC3/FILTER EG - switch between OSC3 or the Filter Envelope as a
modulation source.
(5) GLIDE - adjust the amount of Glide (Portamento), between notes on the
keyboard.
(6) TUNE - adjust the frequency of oscillators 1, 2, and 3. (OSC3 is not aected
if the OSC3 CONTROL switch is o .)
(7) OSCILLATOR MODULATION - when ON, the three oscillators are
modulated by the modulation mix, set by the MOD MIX knob.
(8) MOD MIX - adjust the modulation mix between OSC3/Filter EG and Noise/
LFO.
(9) NOISE (MOD SRC)/ LFO - switch between Noise (or external modulation
source) or Low Frequency Oscillator (LFO) as a modulation source.
(10) MOD DEPTH - adjust the modulation depth from o to maximum. The
modulation depth can also be adjusted using the modulation wheel on a
MIDI keyboard.
(11) WAVE SHAPE - select the LFO wave shape from either triangular or square
wave.
(12) LFO RATE - adjusts the frequency of the LFO.
9 MODEL D User Manual
(20) (21) (22)
(24)
(25)
(23)
(26) (27)
(28) (29)
3.1.3 Oscillator Bank Section
(17)
(18)
(19)
3.1.4 Mixer Section
(26) (27)
(28) (29)
(25)
(24)
(23)
(13) (14) (15) (16)
(13) OSC 3 CONTROL - when ON, the frequency of OSC 3 will vary with the
keyboard. When OFF, the keyboard, Pitch wheel, and Modulation wheel,
will have no eect on OSC 3.
(14) FREQUENCY RANGE - selec t from six frequency ranges of Oscillator
1, 2, or 3.
(15) FREQUENCY ADJUSTMENT - adjust the frequency of Oscillator 2 or 3.
(16) WAVE SHAPE - select the wave shape of Oscillator 1, 2, or 3 from:
triangular, triangular/ sawtooth (OSC1 and 2), reverse sawtooth (OSC3),
sawtooth, square, medium pulse, and narrow pulse.
(17) MOD SOURCE (INPUT) - allows connection of an external modulation
source. If nothing is connected here, then the internal Noise generator is
available as a modulation source.
(18) OSC 1V/OCT (INPUT) - this input allows the frequency of the three
oscillators to be adjusted by an external control voltage (1 Volt input
increase, will increase the frequency by one Octave).
(19) LFO CV (INPUT) - allows control of the LFO frequency by an external
control voltage.
(20) (21) (22)
(20) VOLUME - adjust the volume of Oscillator 1, 2, or 3.
(21) ON/OFF - select the sources to play from OSC1, OSC2, OSC3, Noise, and
External Input, or any combination of these 5 sources.
(22) NOISE VOLUME - adjust the level of the internal Noise source.
(23) WHITE/PINK - switch the internal Noise source from Pink noise to White
noise.
(24) OVERLOAD - indicates when the audio levels of the mix are overloading
the mixer section.
(25) EXT IN VOLUME - adjust the level of any external source playing into the
external Input.
If nothing is connected to the external input, then instead of any external
audio coming in at this point, the main MODEL D output is automatically
connected here. This creates a feedback path from the output back into
the mixer section, to get extra phat bass or extra crunch. In this case,
the EXT IN volume control will adjust the level of the incoming main audio
fed back into the mixer section.
(26) LFO Triangular (OUTPUT) - outputs the internal LFO triangular-
wave signal.
(27) LFO Square (OUTPUT) - outputs the internal LFO square-wave signal.
(28) EXT (INPUT) - connect any external line-level audio source to this
3.5 mm input. If nothing is connected here, then the main audio output is
internally connected to this external input.
(29) MIX (OUTPUT) - outputs the nal mix from this Mixer section.
10 MODEL D User Manual
(7)
(47)
(46)
(8)
(9)
(44)
(42)
(45)
(43)
(24)
(25)
(23)
(18) (26) (27)
(48)
(49)
(28) (29)(19)
3.1.5 Modiers Section
(37) (38) (39) (40)
(41)
(33)
(32)
(36)
(31)
(35)
(30)
(34)
(30) DECAY - when ON, the signal will decay during the time set by the DECAY
TIME knob after a note or external trigger is released. When OFF, it will
decay immediately after a note or external trigger is released.
LOUDNESS DECAY - aects the decay of volume level of the Loudness
section.
FILTER DECAY - aects the decay of the cuto frequency of the Filter
section.
(31) KEYBOARD CONTROL - these switches vary the eect of the keyboard
tracking, where the lter section is aected by the pitch of note played.
(35) FILTER ENVELOPE CONTROLS - these 3 knobs adjust the overall shape
enveloping the lter section. The controls aec t the change in cuto
frequency with time.
ATTACK - adjust the time for the cuto frequenc y to increase from its
set value and reach the frequency set by the AMOUNT OF CONTOUR
control.
DECAY TIME - adjust the time for the cuto frequency to decay down to
the sustain frequency after the attack time is over. If the FILTER DECAY
switch is ON, then this decay time is also how long it takes to decay from
the sustain frequency once a note is released.
SUSTAIN - adjust the cuto to a frequency which is sustained after the
attack time and initial decay time have been reached.
(36) FILTER CONTROLS - the lter can be Low-Pass or High-Pass, depending
on the setting of the FILTER MODE switch. In Low-Pass mode, audio
frequencies above the cuto frequency are attenuated. In High-Pass mode,
audio frequencies below the cuto frequency are attenuated.
CUTOFF FREQUENCY - adjust the cut-o frequency of the lter.
FILTER EMPHASIS - adjust the amount of volume level boost
(resonance) given at the cut-o frequency.
AMOUNT OF CONTOUR - adjust the amount of frequency shift given to
the cuto frequency.
(37) CUT CV (INPUT) - allows connection of a control voltage to control the
cuto frequency.
(38) FC GATE (INPUT) - allows an external trigger voltage to be applied to
trigger the lter contour.
(39) FILT CONT (OUTPUT) - outputs the lter contour.
(40) LC GATE (INPUT) - allows an external trigger voltage to be applied to
trigger the loudness contour.
(41) LOUD CONTOUR (OUTPUT) - outputs the loudness contour.
Switch 1 and 2 OFF - no keyboard tracking eect
Switch 1 and 2 ON - maximum eect
Switch 1 ON (only) - 1⁄ 3 of maximum eect
Switch 2 ON (only) - 2⁄ 3 of maximum eect
(32) FILTER MODULATION - when ON, the lter section is modulated by the
modulation mix, set by the MOD MIX knob.
(33) FILTER MODE - select the lter between Low-Pass or High-Pass.
(34) LOUDNESS CONTOUR - these 3 knobs adjust the overall shape enveloping
the audio after it has passed through the mixer section and lter section.
The controls aect the change in volume (loudness) level with time.
ATTACK - adjust the time it takes for the signal to reach a maximum
level after a note is played.
DECAY TIME - adjust the time for a signal to decay down to the sustain
volume level after the attack time is over. If the LOUDNESS DECAY switch
is ON, this is also how long it takes to decay to minimum once a note is
released.
SUSTAIN - adjust the volume level that the signal is sustained after the
attack time and initial decay time have been reached.
11 MODEL D User Manual
(24)
(25)
(23)
(28) (29)(19)
3.1.6 Output Section
(48)
(44)
(43)
(42)
(45)
(49)
(47)
(46)
3.2 Rear Panel
1 2 3 4
5 6 7 8
(51)(50)
(52)
(53)
(42) A-440 - use this to turn on an output tuning signal of 440 Hz concert
pitch. This switch can also be used to enter various modes during turn-on
(see the Overview section of this manual for more details).
(43) POWER LED - this LED shows when power is applied and the synthesizer
is turned on. It is also used to indicate the current status when changing
modes
(44) VOLUME - adjust the overall volume level of the synthesizer output.
(45) VOLUME (HEADPHONE) - adjust the overall volume level of the PHONES
output.
(46) PHONES - connect your headphones to this 3.5 mm TRS output. Make sure
the headphone volume is turned down before putting on headphones.
(47) ON - use this to quickly turn on or Mute the main audio output of the
synthesizer.
(48) LOUD CV (INPUT) - allows connection of an external control voltage to
control the Loudness Contour.
(49) MAIN (OUTPUT) - use this 3.5 mm TRS connection to output the main
audio output. Typically it can be patched to the audio input of another
MODEL D or to the audio inputs of other modular synthesizer equipment.
If you are using the MODEL D in a Eurorack, then this is the main output,
as the rear panel output connectors are not used.
9 10 11 12
13 14 15 16
(50) MAIN OUTPUT - connect these ¼” TRS outputs to the inputs of
your external equipment as follows (note that they are both Mono,
and not left/right):
LOW - this instrument-level mono output can connect to the
instrument-level inputs of guitar ampliers or mixers for example.
HIGH - this line-level mono output can connect to the line-level inputs
of mixers, keyboard ampliers, or powered speakers for example.
(51) MIDI CHANNEL - these 4 switches allow you to set the MIDI Channel
number from 1 to 16 (see the table above). The MIDI channel can also be
changed using MIDI SysEx commands, as shown in the MIDI SysEx tables
later in this manual. (This method is used when the MODEL D is housed in a
Eurorack, and these switches are no longer present.).
(52) POWER - turn the synthesizer on or o . Make sure all the connections are
made, and the volume is turned down before turning on the unit.
(53) DC INPUT - connect the supplied 12V DC power adapter here. The power
adapter can be plugged into an AC outlet capable of supplying from 100V
to 240V at 50 Hz/60 Hz. Use only the power adapter supplied.
12 MODEL D User Manual
4. Overview
This overview will help you set up the MODEL D analog synthesizer and briey
introduce its capabilities.
4.1 Connection
To connect the MODEL D to your system, please consult the hookup examples in
this document.
Caution: Do not overload the 3.5 mm inputs. They can only accept the
correct level of voltages as shown in the specication tables. The 3.5 mm outputs
should only be connected to inputs capable of receiving the output voltages.
Failure to follow these instructions may damage the MODEL D or external units.
4.2 Software Setup
The MODEL D is a USB Class Compliant MIDI device, and so no driver installation
is required. The MODEL D does not require any additional drivers to work with
Windows and MacOS.
4.3 Hardware Setup
Make all the connections in your system. Use the rear panel MIDI switches to set
the MODEL D to a unique MIDI channel in your system. Connect the MIDI OUT
output of an external MIDI keyboard directly to the MIDI IN 5-pin DIN type input
of the MODEL D.
Apply power to the MODEL D using the supplied power adapter only. Ensure your
sound system is turned down. Turn on the MODEL D rear panel power switch.
4.4.1 External Input
The audio from an external source can be connected to the External Input
connector to play into the mixer section, and the volume can be adjusted using
the EXT IN VOLUME knob, and selected using the adjacent selector switch.
If nothing is connected to the external input, then instead of any external audio
coming in at this point, the main MODEL D output is automatically connected
here. This creates a feedback path from the output back into the mixer section,
to get extra phat bass or extra crunch. In this case, the EXT IN volume control will
adjust the level of the incoming main audio fed back into the mixer section. The
level is still dependent on the setting of the main output volume knob (44) and
the position of the main ON switch (47). Give it a try!
4.5 Oscillator Section
In the Oscillator section, adjust the Range knob and you will hear the sound of the
various octaves. Adjust the wavetype and listen to the dierences.
The oscillator modulation switch allows the oscillator frequency to be modulated
by the modulation mix.
4.3.1 Warm Up Time
We recommend leaving 15 minutes or more time for the MODEL D to warm up
before recording or live performance. (Longer if it has been brought in from the
cold.) This will allow the precision analog circuits time to reach their normal
operating temperature and tuned performance.
4.3.2 Initial Setup
A quick way of nding out if your external sound system is working, is to turn on
the A-440 switch on the MODEL D and adjust the volume control. This will send a
constant tone (440 Hz) to your external amplier and speakers.
4.4 Mixer Section
The MODEL D has three oscillators, an internal Noise generator, and an external
source input. Each of these, and any combination, are used by the MODEL D to
generate sound.
The Mixer section allows you to turn each of these sources on or o , and adjust
the volume of each to create an overall mix. Star t by turning on the top switch for
Oscillator 1, and turn o the others. Adjust the volume control of Oscillator 1. In
the Output section, adjust the main volume. Now, if you play a note on your MIDI
keyboard, you should hear the sound of Oscillator 1 only.
The OSC 3 switch allows its frequency to be aected by, or be independent of, the
notes played on the keyboard, and the modulation and pitch wheels.
Note: The TUNE knob and OSCILLATOR-2 and -3 FREQUENCY knobs are marked in
units of semitones as a general guide.
4.6 Filter Section
Play with the Cuto Frequency, Emphasis, and Contour, and listen to their eects
on the sound. Adjust the Attack, Decay, and Sustain; they aect the cuto
frequency with time, while a note is played.
The lter decay switch aects the decay after a note is released. The 2 keyboard
switches aect how much the lter is aected by the frequency of notes that are
played.
If the lter modulation switch is ON then the lter section is modulated by the
modulation mix.
Turn on other oscillators and/or noise and adjust their volume controls to create
a mix.
4.7 Loudness Contour Section
In this section, adjust the Attack, Decay, and Sustain; they aect the overall level
with time, while a note is played. The loudness decay switch aects the decay in
level after a note is released.
13 MODEL D User Manual
4.8 Controllers Section
First set the 2 switches to choose from internal LFO or internal Noise, OSC 3 or the
lter envelope, and then use the MOD MIX knob to vary the mix between them.
You can experiment by rst setting the lef t switch to OSC 3, and turning the MOD
MIX knob to OSC 3. Then set the Oscillator 3 RANGE control to LO, and the
Oscillator Modulation switch ON. You may now be able to hear the sound of the
Oscillator 1 modulated by OSC 3. Use the MOD DEPTH knob, and/or the
Modulation wheel of your keyboard to increase the eect.
If the Filter Modulation switch is ON, listen to the eect of modulation on the
lter.
The Modulation Sensitivity curve can be chosen from hard, medium, or soft (the
default), using the SysEx commands shown later in this manual.
4.9 Special Modes
The A-440 switch can be used to set the MODEL D into various modes of
operation. This is done by turning the A-440 switch on and o a certain number
of times within the rst 5 seconds of turning on power to the MODEL D. The
number of times determines the mode, as shown in the table below. The Power
LED will show the current value by ashing fast or slow a number of times, as
shown in the table below.
4.9.1 Multi-Triggering
Multi-triggering - On: playing a new note will change the pitch and also
trigger the lter and loudness contour envelopes.
Multi-triggering - O (default, Legato): playing a new note will change
the pitch, but with no new triggering unless all notes are released. For
example, you can play a note and hold it down, and any new note will play
and use the envelopes of the note being held. The second note will of ten
play after the attack and decay time of the held note has passed, so the
second note will not have the sound that the attack and decay usually give.
4.9.2 Note Priority
Note Priority - if more than one note is played at the same time, this sets
which note has priority: the last note played, the lowest (default), or the
highest.
4.9.3 Poly Chain
Poly Chain - if you have multiple MODEL D units, you can connect them
in a Poly Chain so that the rst MODEL D plays the lowest note, the second
MODEL D plays the second lowest note, and so on, to produce polyphonic
sound.
Each MODEL D must have the same MIDI channel number set using the rear
panel switches. The Poly Chain connections are shown in the diagram in the
hookup diagrams of this manual.
Only set the Poly Chain ON for the rst MODEL D. Turn it OFF if you no longer
require a Poly Chain system.
If you are only using one MODEL D, then make sure the Poly Chain is OFF.
4.10 Eurorack
The MODEL D synthesizer can be taken out of its factory chassis and tted into a
standard Eurorack case (not supplied). Please see the details shown later in this
manual.
A-440
The special modes are: Multi-trigger, Note Priority, and Poly Chain operation.
Press the A-440
switch:
On and o Multi-trigger ON Flashing fast twice
On and o and on Note Priority
On and o,
On and o
Mode Power LED FLashing
Multi-trigger OFF Flashing slow twice
Flashing 3 times
LAST/LOW/HIGH
Poly Chain ON Flashing fast four times
Poly Chain OFF Flashing slow four times
4.11 Firmware Update
Please check our website behringer.com regularly for any updates to the
rmware of your MODEL D synthesizer. The rmware le can be downloaded and
stored on your computer, and then used to update the MODEL D. It comes with
detailed instructions on the update procedure.
4.12 Have Fun
The MODEL D has various Gate and CV inputs and outputs that allow for further
experimentation and expansion to other MODEL D units and modular synthesizer
equipment.
The SysEx features of the MODEL D allow you to set and adjust various parameters
to suit your preferences. Please see the SysEx information later in this manual.
Make copies of the patch sheet in this manual, and record your favorite settings.
With all these controls, the possibilities for musical creativity are endless, rather
like an artist with a new box of paints. We hope that you will enjoy your new
MODEL D.
14 MODEL D User Manual
5. Calibration
The MODEL D synthesizer can be calibrated and checked occasionally to ensure
that it is operating at peak perfomance. Analog circuitry can drift o with time
and temperature, and as components age.
The main printed circuit board (PCB) of the MODEL D has various test points
and miniature potentiometers (trimpots) that allow the various calibration and
adjustment procedures to be carried out. This involves lifting up the front panel
to allow access to the bottom side of the PCB.
Three main calibrations can be carried out:
1. The PITCH CV can be calibrated using a computer to send a SysEx command,
an external keyboard, and a digital DC voltmeter. See section 5.2
2. The oscillators can be calibrated using a guitar tuner or the internallygenerated A-440 concert pitch, and an external keyboard. See section 5.3
3. The Octave RANGE can be calibrated using an external keyboard. See section
5.4
We recommend that the following procedures are undertaken only
by an experienced ser vice technician, to prevent personal injury, or
damage to the unit.
As the internal PCB trimpots are delicate, make sure the procedures are not
undertaken too many times. Damage to the trimpots is not covered under
warranty, so please take every care when adjusting them.
Preparations
Before doing the PITCH CV calibrations, become familiar with, and practice the
procedures for sending SysEx commands to the MODEL D. In this way, you will
spend less time with the calibrations.
5.1 Preliminary Procedure
Follow all steps in the order in which they are presented.
The diagram below shows the typical connections for this procedure.
Laptop or desktop computer
running a MIDI Utility
to send SysEx messages
(for PITCH CV calibration)
USB B
MIDI IN
USB A
MOTŌR49 MIDI Keyboard/Controller
MIDI OUT
A-440 Reference
The MODEL D A-440 pitch is generated and regulated by the MCU and there is no
adjustment required. This set frequency is used as a reference in the following
procedure to calibrate OSC1.
Equipment required
• Small insulated trimpot screwdriver
• Small Phillips screwdriver
• A at sheet of cardboard or other insulator as wide as the MODEL D. (This will
help prevent damage to the top panel when it is inverted and resting on the
bottom chassis)
The following equipment is required for the Oscillator
adjustment and Octave Range adjustment:
• An external MIDI keyboard of at least 3 octaves including A2 and C6
• MIDI cable
• Pair of headphones or a sound system to monitor the main output
The following equipment for the Pitch CV adjustment:
• Digital DC Voltmeter with a scale that can display accurately to 0.001 V
• Laptop or desktop computer previously loaded with and running a MIDI
utility that can send SysEx commands to the MODEL D
• USB type A to USB type B connection cable
Important Note about Reset
If you have previously adjusted the MIDI IN Transpose or MIDI Note Zero Volts,
you MUST reset the MODEL D to its factory settings before doing the following
procedures. The details of using SysEx to send the Reset command are shown on
page 30.
Power
Adapter
*Use Headphones or a Loudspeaker
*Active Loudspeaker
to listen to the output during
the Oscillator calibration
*Headphones
5.1.1 Connections
1. Connect the external power supply adapter to the rear power input of the
MODEL D.
2. Connect the MIDI output of an ex ternal keyboard to the MIDI IN connector of
the MODEL D.
3. Connect a laptop or desktop computer to the MODEL D USB input. (This is
only required if you are doing the PITCH CV calibration, or doing a Reset.)
4. Turn down the MODEL D headphone volume knob, and connect your
headphones to the MODEL D headphones output connector. Alternatively,
you can monitor the MODEL D output using the main outputs and a suitable
sound system and speakers.
5. Turn on the MODEL D rear panel power switch and check that its Power LED
comes on.
6. Important: Leave the MODEL D turned on for approximately 30 minutes.
This will allow the circuits time to warm up and the components and
performance to stabilise with temperature. Without this warm-up time, the
calibrations will be inaccurate.
7. Set the MODEL D controls as shown on the next page.
continued on page 16
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