Notes: While ADDAC were working on the new VC Stompboxes several expression pedals were tested and it became clear that most often, while playing a modular system, your hands are busy.
It's also normal to have an expression pedal lying around somewhere, so ADDAC have brought these back, cleaned up the dust and put them to good use.
This module allows the connection of any standard expression and sustain pedal.
The expression pedal action can be fine-tuned with Range and Offset knobs.
Range defines the voltage range (-10v, +10v).
Offset transposes the range by (-5v, +5v).
Two leds, plus and minus, monitor the CV Output
Positive and inverted output jacks.
The sustain pedal action will generate a gate signal on the gate output.
One led monitors this output.
The module also features a bus board +5v Adaptor, this will be able to provide +5v to any bus board.
This feature can be removed through a jumper on the back of the module.
- Width: 4 HP
- Depth: 4 cm
- Max current: 20mA
. Bus Board Cable: 8 × 2 IDC (Doepfer style) connector
Notes: Following ADDAC System's T-Networks series, the importance of having the right input signal for firing drum modules or envelopes was realised. Gates and Triggers are often looked at as similar signals but at times it really makes a difference and results will change drastically depending if a Gate or a Trigger is fed to the input of such modules.
This led to the simple yet effective Gate to Trigger.
A four channel converter with bypass switch for each channel.
12dB multi-mode filter with unique classic circuitry, based on the filter from the 70s EDP Wasp synth
Notes: Module A-124 is a special 12dB multimode filter using the "strange" filter circuit of the "EDP Wasp" (an analog synthesizer with black/yellow case built end of the seventies, manufactured by the UK company "Electronic Dream Plant" with Chris Huggett und Adrian Wagner). This design "abuses" digital inverters as analog operational amplifiers leading to distortions and other "dirty" effects that generate the specific sound of this filter. The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal. If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates. The module does not feature self-oscillation in contrast to most of the other filters of the A-100 system.
Inputs: Audio In, CV In (2x)
Outputs: Bandpass Out, Low/Highpass Mix-Out
Controls: Audio and CV attenuator, Frequency, Resonance, LP/HP Mix
The function and operation of this module is very similar to the module SEM VCF A-106-5. But the sound of both filters is very different! The only functional difference is the position of the sockets and controls, and the function of the controls CV2 (A-124: normal attenuator, A-106-5: polarizer).
- 3U Eurorack module, 8HP wide, 45mm deep
- Current draw 30mA
Notes: Module A-151 (Quad Sequential Switch) is like an electronic four-position rotary switch.
It includes trigger and reset inputs, four in/outputs, and a common out/input. Each time a pulse is received at the trigger input socket, the common out/input is connected to the next in/output. After the fourth in/output, the next trigger makes it step back to the first again, and so on. A positive pulse at the reset input switches the out/input immediately back to the first in/output. Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.
Four LED's indicate the active in/output (ie. the one that is connected to the out/input at any particular time).
Notes: The 'HPO' is an affordable super slim and skiff friendly no frills stereo headphone driver output for your modular synthesiser. Includes a volume control and ability to double up a mono signal into stereo. A great use for that left over 2hp in a skiff or larger system.
Give loved ones, friends and acquaintances a break from your musical 'genius', the HPO offers a solitary cell for focused creativity impregnable from undeserving non-believers.
Precision adder (mixer) and buffer for control voltages - 6HP
Notes: Module A-185-2 is a precision control voltage adder/buffer. Precision means that the amplification of the inputs without attenuators is exactly 1.00 and is suitable to add control voltages for the pitch control of VCOs (e.g. from keyboard + sequencer 1 + sequencer 2). Summing resistors matched to 0.1% are used to obtain an accuracy of 0.1% for the added voltages.
The module is equipped with four CV inputs: one with attenuator and three without attenuator. Each input is normalled to +1 V (i.e. if no plug is inserted the input contributes 1 V to the sum appearing at the output).
The input with attenuator can be used for common modulations (e.g. from an LFO, ADSR, Theremin, Pitch-Bender) for all VCOs connected to the output. The Lev.1 control is used to adjust the depth of the modulation, the first switch selects the polarity of the modulation. If no signal is connected to the first socket the attenuator works as a (fine) tuning knob because a voltage in the range 0...+1V (right position of the switch) or 0...-1V (left position of the switch) is added to the CV output.
The inputs without attenuators are planned to add control voltages coming out of keyboards, sequencers, Midi-to-CV interfaces, ribbon controllers or other CV sources that follow the 1V/oct standard. For example the CV of a keyboard can be used to transpose the CV coming from a sequencer, or the CV of a slow sequencer can be used to transpose the CV from a fast sequencer.
Each input is equipped with a three-position switch that determines if the corresponding voltage is added (right position), subtracted (left position) or if the input has no effect (centre position). If no plug is inserted the corresponding switch works as an octave switch for the lower three sections as the default 1 V are added or subtracted to the output voltage according to the switch position. The first switch can be used to add a variable voltage to the sum output. The variable voltage is adjusted with the Lev.1 control and the knob works then as kind of a (fine) tuning control.
The module is equipped with 4 outputs: three non-inverting and one inverting ouput. An internal jumper can be used to connect the non-inverted or inverted output to the CV line of the A-100 bus. That way the module can used to control several VCOs that are connected to the same bus board as the A-185-2 (same functionality as A-185-1).
Notes: Module A-151 (Quad Sequential Switch) is like an electronic four-position rotary switch.
It includes trigger and reset inputs, four in / outputs, and a common out / input. Each time a pulse is received at the trigger input socket, the common out / input is connected to the next in / output. After the fourth in / output, the next trigger makes it step back to the first again, and so on. A positive pulse at the reset input switches the out / input immediately back to the first in / output (see Fig. 1). Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.
Four LEDs indicate the active in / output (i.e. the on that is connected to the out / input at any particular time).
Breakout expander for the Batumi quadruple LFO module
Notes: Poti is a simple but very useful breakout expander for the Batumi quadruple LFO module by Xaoc Devices. Its panel provides an immediate access to the Batumi functions originally selected by the cluster of jumpers on the back of the module: Reset/Sync mode option and selection of the assignable waveform.
Envelope follower & pre-amplifier for microphone/line-signals - 8HP
Notes: Module A-119 (External Input / Envelope Follower) is designed to allow external audio signals to be integrated into the System A-100. It comprises a pre-amp, envelope follower, and comparator.
The pre-amp has two inputs: an unbalanced input for line level signals, with a gain factor of from 0 to 20, and a balanced input with a gain factor of from 0 to 500, for insertion of low level signals, for instance from a microphone or electric guitar.
The Envelope Follower reads the signal level of the input, and puts out a proportional voltage as an envelope at its own output.
The comparator generates a gate signal whenever the input goes above an adjustable trigger threshold.
Three LED's help you keep track of overload, the envelope, and the gate signal.
Notes: Module A-182-1 is a simple passive multi-connector similar to the multiples modules A-180-1/A-180-2. In contrast to modules A-180-1/2 each socket is equipped with a 3-position switch that allows to connect the corresponding socket to the internal bus #1 (left position), bus #2 (right position) or to turn the socket off (centre position).
- All switches in left position or all switches in right position: 8-fold multiple
- Four switches in left position and four switches in right position: two 4-fold multiple
- X switches in left position, Y switches in right position and Z switches in centre position: two separate multiples with some sockets turned off
Dual linear VCA module with CV input attenuator & DC-coupled inputs
Notes: The 2hp VCA is a dual, linear VCA. It uses the renowned 2164 SSM architecture, giving it extremely low distortion and high quality audio outputs. With a CV input attenuator, and DC-coupled inputs this is your new go-to module for voltage controlled amplification of audio or CV.
Compact utility synthesiser module for interfacing guitar effects with eurorack modular system - 4HP wide
Notes: The 'S.B.G' is a compact utility module intended for the interfacing of guitar effect pedals with your eurorack modular system.
It provides both attenuation and amplification of audio signals for level matching together with a crossfade control to conveniently adjust the wet/dry mix of a processed signal. The module also offers regulation of outgoing CV signals for safer use of pedal expression inputs.
Supply: +/-12V (Reverse voltage protection)
Current Draw: ~30ma
Size: 4 HP
Depth: 22mm (including power header)
Notes: Simple but effective four-channel module, allowing you to attenuate or offset CV or audio signals. Normalled 5V source on each channel allows you to generate a standalone CV signal without an input.
4TTEN (pronounced either ATTEN or FOUR-TEN) is a four channel attenuator and offset generator.
Use 4TTEN to attenuate any CV or audio signal by running through the ins and outs.
A +5V voltage source is normalled to each input, making it a standalone offset when there is no cable patched into an input.
Each channel is completely independent.
Ever-so-useful in live performance, we designed this module with 4 sliders for easy maneuverability, visual feedback, and enjoyable to play interface. Make your eurorack modular synthesizer system more playable with 4TTEN!
*** 4TTEN's PCB is 113mm (4.45") tall and may be a tight fit in some cases ***
- 4 independent attenuators for Control Voltage and Audio signals
- Performance friendly sliders
- Can be used as 0 to +5V Offset
- Comfortable fader caps from the Performance Mixer
- Only 4 hp!
Depth: 30mm(with cables)
Power: +5mA , -5mA
Virtually no drop on 1V/Oct signals.
VERTICAL PCB LENGTH: 113mm (4.45")
IMPEDANCE = (SOURCE + 100ohm ) / 100kohm
Notes: The SEQ16 is a 16-step sequencer for controlling oscillator pitch and triggering envelopes.
Compared to "classic" analogue sequencers it works a bit different: Instead of setting the CV for each step independently (which means in fact "tuning" each step which can be a bit tedious), the SEQ16 has 5 knobs for pre-setting different CV's (= notes); each of the 16 step knobs selects one of these CVs, plus 0V (=base note) plus Pause (no trigger output). So some CVs have to be fine-tuned once; with the step knobs you can focus entirely on the sequence itself and you can even modify it on the fly, still remaining in tune.
An additional feature is "accent"; this can be set for each step by turning the knob fully clockwise. If a step is set to "accent", a separate trigger output is set and also a gate repeat for the regular gate output can be selected (from one to eight repeats).
Notes: A-138s is a simple but useful 4-in-2 mixing tool. It has four inputs available. Each input is equipped with an attenuator (Level) and a panning control that is used to distribute the signal to the left and right output. Beyond stereo mixing it is equally suited to create variable parallel routings. For example: Any of the four inputs may be routed in variable intensity to feed two filters.
You may regard the A-138s as a smaller version of the A-138m Matrix Mixer.
Inputs and outputs are DC coupled, i.e. the module can be used for the mixing of control signals too.
- 3U Eurorack module, 8 HP wide, 30 mm in depth
- Power consumption: 10 mA at +12 V and 10 mA at -12 V
Two sample & hold units in one module for generating stepped random voltages or slicing signals
Notes: Module A-148 (Dual S&H) has two identical sample & hold modules, designed to produce 'staircase' voltages. The signal present at the sample input is sampled at a rate set by the signal at the trigger input, and held at that voltage at the S&H output.
The exact shape of the staircase depends on the sort of waveform at the sample input: NOISE or RANDOM signals produce random patterns; an LFO produces rising or falling staircase patterns.
Two LEDs for each S&H indicate the voltage (positive or negative) of the sampled signal.
Notes: Module A-138n is a simple four channel mixer, which can be used with either control voltages or audio signals. Each of the four inputs has an attenuator available. The output is twice available (two sockets, hard-wired like a multiple).
The module is the slim version of module A-138a and offers nearly the same features. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-138a. The module is primarily planned for applications where only limited space is available. The only functional difference compared to the A-138a is the missing attenuator for the (dual) output.
Notes: Module A-130-2 is the slim version of module A-132-3 and offers essentially the same features. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-132-3. The module is primarily planned for applications where only limited space is available.
The module is composed of two identical voltage controlled amplifiers (VCA). Each VCA has a manual gain control (also named Initial Gain) and a control voltage input with attenuator. The character of the control scale can be switched to linear or exponential. All inputs and outputs are DC coupled. Consequently the VCAs can be used to process both audio and control voltages (e.g. for voltage control of the level of LFO or envelope signals). The signal input has no attenuator available but is capable to process up to 16Vpp signals (i.e. -8V...+8V) without distortion. For the processing of higher levels an external attenuator (e.g. A-183-1) is recommended.
The amplification range is 0...1. Even with a higher external control voltage the amplification remains at 1 (kind of "amplification clipping" at 1).
Controls (for each of both units):
- Gain: manual gain control (Initial Gain) in the range 0...1
- CV: attenuator for the CV input
- Lin/Exp: switches the VCA characteristic to linear or exponential, in center position the VCA is off (mute function)
Inputs and outputs (for each of both units):
- CV: control voltage input, min. +5V required for max. amplification (1) with CV control fully CW and Gain fully CCW
- In: signal input, max. 16Vpp (+8V...-8V) without distortion
- Out: signal output
Notes: A-182-2 is a simple passive module that contains four changeover switches, which are used to connect or disconnect the sockets of the corresponding socket triplet:
- In the upper position of the switch the upper socket of the corresponding socket triplet is connected to the centre socket
- In the lower position of the switch the lower socket of the corresponding socket triplet is connected to the centre socket
- In the centre position of the switch the sockets are not connected
Each unit of the module can be used to switch between two signals or to interrupt/connect a signal. In the last case the third socket of the triplet is not used.
The module is fully passive and both audio or control signals can be switched.
Notes: A-149-2 is an extension module for A-149-1. It makes available 8 digital random voltages (i.e. only low/high states like a gate signal). The outputs are controlled by the "Quantized Random Voltages" section of the assigned A-149-1 and correspond to the 8 digital outputs of the shift register that is used to generate the Quantized Random Voltages. As the alteration of the A-149-2 outputs is clock controlled by the Clk In of the "Quantized Random Voltages" section of the A-149-1 the A-149-2 can be used to create random rhythmical sequences.
The A-149-2 requires the A-149-1 and has to be mounted directly to the left or right of the A-149-1 as an internal ribbon cable connection has to be established between A-149-1 and A-149-2.
Voltage-controlled clock multiplier with CV or manual control - 4HP
Notes: Module A-160-5 is a voltage controlled clock multiplier. The incoming clock signal (socket Clock In) is multiplied by a factor that depends upon the control voltage on socket CV In (0...+5V) and the position of the Mode switch. The multiplied clock signal is available at the socket Clock Out. According to the position of the Mode switch different clock multiplying factors are assigned to the control voltage. With 0V CV no clock output is generated. This state is indicated by "all LEDs off". With increasing CV integer factors (left position of the mode switch), power of two factors (middle position) or a mix of both (right position) are obtained. Nine LEDs are used to show the currently selected multiplying factor. In addition two LEDs are used to display the incoming and outgoing clock signal.
A manual control is used to adjust the clock multiplication factor manually without the need of an external control voltage. The voltage generated by this control ("Manual") is normalled to the CV In socket. As long as no plug is inserted into the CV In socket the clock multiplication factor is adjusted by means of the manual control knob and displayed by the LEDs. For dynamic applications (like the ratcheting function described below) the manually generated CV is overwritten by the external CV which has to be fed into the CV In socket.
The module can be used for all kind of clock multiplying applications. One important example is the generation of so-called ratcheting sequences. The band Tangerine Dream is famous for this kind of sequences. A normal sequencer generates only one gate signal per step. A ratcheting sequence may have also more than one gate pulses per step. This function can be obtained by using the A-160-5: one CV output of the sequencer is used to define the number of gate pulses per step. If the control of the step in question is fully CCW the generated CV is 0V and no gate signal is generated (mute of the step). When the control of the step in question is turned clockwise one, two or more gate pulses are generated depending upon the position of the mode switch and the voltage generated by the CV at this step.
Technical note: Due to the nature of clock multiplying it takes a few input clock pulses until the clock output is stable. One has to average a few input clock pulses to generate the multiplied clock output signal. Even when the input clock frequency changes it will take a few cycles until the output clock signal is correct as the module cannot foresee the future of the clock input signal. The generated clock output signal is derived from the last few cycles of the clock input signal. Consequently the module should be driven only by a clock signal with constant or slowly changing frequency.
Notes: Enter the Behringer 921A OSCILLATOR DRIVER. An authentic reproduction of the circuitry from the Modular 55 and 35 series oscillator drivers used by the world's most famous pop, rock and jazz musicians. Now you can build your very own, unique synthesizer that can fit in a standard Eurorack case for a very affordable price. Mix and match with specific modules to customize your synth and complement the genre of music you play or go all out and have a room filled from floor to ceiling with modules that'll fulfill any synth geek's wildest dreams.
The 921A OSCILLATOR DRIVER module features a frequency knob that can adjust between either octave or semitone frequencies. The included rocker switch can be used to select between the two frequency types. The width of the rectangular wave is adjusted via a control knob that goes from 10% up to 90%. You can also connect any incoming control voltage or modulation signal into either of the 3.5 mm Frequency or Width inputs.
The 921A not only controls just one 921B Oscillator, but 12 of them- providing you with more flexibility and more nuanced waveforms.
Installing the 921A is simple as it was designed to fit into a standard Eurorack case. Just connect the power cables to the power supply and screw in the module using the included screws. This allows for the 921A to be mixed with other synth modules for a truly unique set up.
Notes: A Bernoulli gate takes a logic signal (trigger or gate) as an input, and routes it to either of its two outputs according to a random coin toss. The knob controls how fair the coin toss is - with the knob in minimal position, the first output always win, with the knob in maximal position the second output always wins - with random fun in-between. And obviously, this bias is CV-controllable!
Branches packs two such gates in a small 6-HP panel. Get a sequencer to randomly skip steps, randomize drum patterns, dispatch events from a sequence to two subpatches, or patch a monster modular Pachinko machine...
Expander for Odessa or other XAOC Devices polyphonic oscillators
Notes: Hel is a universal expander for polyphonic oscillator modules from Xaoc Devices, such as the Odessa. The module makes it possible to freely control up to five voices of polyphony via individual volt/octave inputs.
Notes: To any new modular system owner, the need to easily combine different voltage sources quickly becomes apparent. While a mixer is the obvious solution, these modules are not suitable for adding precise pitch control voltages (CVs) since the channel gains cannot be set exactly to unity.
Add 2 provides a compact solution to this problem, precisely summing the input signals down to 1 or 2 outputs. Alternatively, each section can be configured as an averager using the jumpers on the rear. This way, LFO waveforms or audio sources can be combined while maintaining the average signal level and avoiding clipping. The high-end components provide exceptional performance, making Add 2 suitable for audio, control voltages and gates/triggers.
With the bottom section's first input not in use, the top output is injected into the bottom. This allows 5 signals to be combined into 2 outputs, adding flexibility to your patching.
Notes: The CMOS Party Logic, by Blue Lantern, is a readily patchable boolean logic module just waiting for a square wave or clock signal into its corresponding A and B inputs in order to generate a variety of output signals. The module's AND, NAND, NOR, XOR, and OR outputs ensure a variety of potential combinations.
Additionally, the CMOS Party Logic features extremely low latency and is capable of operating at audio rate.
Notes: This is an active multiple using the TL074 op amp to copy the signal and repeat the patch, using a simple design. What goes in, comes out exactly the same, and no resistors have been used to play with the ratios. A 100k to ground clamp has also been added so that you can copy even fast clocks, gates, etc and they will not 'stick' together to make one big pulse, which can be a problem with some multiples.
You can have two long 8 repeated outs and one four repeated out, or patch all five inputs to have five sets of four repeated outs.
Seven channel mixer with classic analogue sound - 3HP
Notes: MIX7 is a seven channel analogue summing mixer module for Eurorack. It is designed for summing any of the different types of signals you'll find in a modular system: Audio, CV, Triggers, or Gate.
MIX7 gives ability to sweeten your mix with more headroom using the power of low noise analogue summing. A compact 3HP Eurorack utility module, MIX7 is an attractive mixing addition to any rig, especially with the ability to also combine rhythms, note patterns or CV automations from different control sources. The main output of one section can be connected to the input of another MIX7 to create larger mixing groups and complex signal routes inside your modular.
The MIX7 summing mixing circuit is built with low-noise operational amplifiers, giving it an excellent sound quality for mixing audio, the beautiful texture of classic analogue mixing with plenty of headroom to handle hot modular signals, and the versatility to sum non-audio signals in your system to open up new creative possibilities.
Each input is labelled with a number of dots, 1-7, yellow for input and green for output. The module matches Tiptop's system look with clean white faceplate styling.
At the back of the module is a user-configurable jumper allowing users to configure the MIX7 for either unity gain (OUT = IN) or give increased headroom (OUT = 0.4IN) for use with hot audio signals, which makes it a great pairing for Tiptop Audio percussive modules. A peak indicator light on the front panel warns the user of even the slightest audio clipping in the mix, helping to keep all the incoming sound sources at their full original quality.
Notes: The Qx expander adds an EOR (End Of Rise) and an EOF (End Of Fall) trigger/gate output to each of Quadrax's four channels, enabling Quadrax's envelopes, cycles, bursts and LFOs to trigger external modules.
Notes: This is a simple 1U module designed to allow the monitoring of a system using headphones. However, if your cat isn't easily scared, the headphone jack doubles as a TRS stereo line level output. Simply connect the signal that you want to monitor to the 1/8? jacks, plug in your headphones, and adjust the volume as desired.
Notes: Use the Stereo Line In 1U system to bring external audio into your modular system for processing. The system works with balanced +4 dBu professional audio products and with -10dbV unbalanced gear.
The Stereo Line In 1U system comprises two components:
The Stereo Line In 1U module:
Either a Stereo In Jacks 1U module, or a case with built-in 14" audio jacks, such as Intellijel's Palette or 7U cases (with a 2nd generation Audio Jacks board).
Notes: The FSR 1U is built around a custom fabricated FSR with an analog processing circuit. It allows you to generate a variable CV when you press on it (pressing harder generates a larger voltage) along with a corresponding gate signal.
Guaranteed to add some fun, dynamic control over almost any kind of patch!
Notes: Module A-138 is a four channel mixer, which can be used with either control voltages or audio signals. Each of the four inputs has an attenuator, and there's a master attenuator, so that the mixer can be used at the end of the audio chain, i.e. it can be used to interface directly with an external mixer, amplifier, etc.
The A-138b has potentiometers with logarithmic response, so is especially suitable for audio signal mixing.
Envelope generator with CV outputs for modulation - 8HP
Notes: Module A-140 is an envelope generator, and, since it puts out control voltages, counts as one of the modulation devices in a modular system. As soon as the gate input receives sufficient voltage, the ADSR generates a variable voltage, changing in time, called an envelope. This varying voltage is output in normal (positive) and inverted form, and can be used, eg. for voltage controlled modulation of a VCO, VCF, or VCA, or for processing other modules' inputs and outputs.
The shape of the envelope is governed by four parameters: Attack, Decay, Sustain and Release.
The envelope is started (triggered) by a gate signal either from the INT.GATE voltage on the system bus, or, if a signal is put into it, from the gate input socket.
The envelope can also be re-triggered, i.e. start from scratch again, each time a trigger signal is sensed at the Retrig. input socket, when the gate is still open.
Module A-140 has available a three-position toggle switch to select one of three time ranges. The envelope duration ranges from about 50us (microseconds) up to several minutes.
In combination with the Comparator module A-167 a free-running "ADSR-LFO" can be realized.
Notes: Module A-183-9 is a simple power supply for up to four devices which can be powered via USB (e.g. keyboards, smartphones). An LED shows is the +5V are present.
The module has no USB function but provides only the +5V supply for USB devices.
A control LED shows if the +5V are present.
Note: The module requires an A-100 case with built in power supply A-100PSU3. Only this A-100 supply has the required +5V available. We do not recommend the usage of an older A-100 case with A-100PSU2 as this would require the +5V adapter A-100AD5 and the max. current would be limited to 100mA.
Two independent voltage controlled switches in one module - 4HP
Notes: Module A-150 (Dual VCS) contains two separate voltage-controlled switches.
Each switch has a control voltage input, a common Out / Input, and two In / Outputs. The switches are bi-directional: they can work in both directions, so can connect one input to either of two outputs, or either of two inputs to one output. Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.
Two LEDs show which in / output is active (i.e. which is connected to the common out / input).
Notes: Module A-138i is a four channel mixer with an additional mute switch for each input. On top of that it is equipped with two types of single outputs and a dual mix output. All inputs and outputs are DC coupled. Consequently the VCAs can be used to mix both audio and control voltages.
Each input is - apart from the mute switch - equipped with the usual attenuator.
The single outputs offer the attenuated and possibly muted signal of the channel in question. Two version of single outputs are available:
Single Output A: If a plug is inserted into the single output "A" socket the channel in question is removed from the sum signal.
Single Output B: If a plug is inserted into the single output "B" socket the channel in question is not removed from the sum signal. This type of single outputs is available only for the channels 1 and 2.
The output is twice available (two sockets, hard-wired like a multiple).
The distances between the controls and sockets are smaller as for the standard A-100 modules and rubberized small-sized knobs are used. In return the front panel has 6 HP width only. The module is primarily planned for applications where only limited space is available.