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Synth modules

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Cat: 577753 Rel: 06 Jun 19
12dB multi-mode filter - 8HP
Notes: Module A-106-5 is a 12dB multimode filter that is based on the filter circuit of the Oberheim SEM module.

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.

The module generates a distorted audio signal if the level control is set to about 50% (i.e. centre position) or more with A-100 standard signals like VCOs.
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 5 in stock $77.52
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Cat: 731938 Rel: 10 Jun 19
Noise/random generator - 4HP
Notes: Module A-118-2 is the slim version of module A-118-1 and offers essentially the same features as the A-118-1. 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-118-1. The module is primarily planned for applications where only limited space is available. The functional difference between A-118-1 and A-118-2 is the additional T&H/S&H unit which is not included in the A-118-1.

The module generates the signals white noise, coloured noise, continuous random voltage and stepped random voltage (derived from the continuous random voltage by means of a S&H/T&H unit).

The noise signal is generated 100% analogue by amplification of the noise of a transistor. White and coloured noise are usually used as audio sources. The random voltages are normally used as control voltages (e.g. for filter frequency or any other voltage controlled parameter).

The A-118-2 gives you the ability to mix the relative amounts of Red (low frequency component) and Blue noise (high frequency component) in the coloured noise output.

For the continuous random voltage the rate of change (Rate) and amplitude (Level) of the random voltage can be adjusted. The continuous random voltage is derived from the coloured noise signal by low pass filtering. Consequently the settings of the controls for the coloured noise (Blue, Red) affect the behaviour of the random voltage! A dual colour LED (red = positive / yellow = negative output voltage) indicates the continuous random voltage.

The continuous random voltage is used as source for the S&H/T&H unit. The type of operation can be set to S&H (sample and hold) or T&H (track and hold). When T&H is chosen the output signal follows the input signal (= continuous random voltage) as long as the Clock input is "high". As soon as the clock signal changes to "low" the last voltage is stored. When S&H is chosen the input signal (= continuous random voltage) is sampled at the rising edge of the Clock signal.

For the Clock signal a "digital" signal (e.g. Clock, Gate, rectangle output of an LFO) is required. It does not work with slowly changing continuous CV signals. Another dual colour LED (red = positive / yellow = negative output voltage) indicates the stepped random voltage.
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 3 in stock $75.42
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Cat: 731939 Rel: 11 Jun 19
Voltage controlled 12dB/octave filter - 8HP
Notes: Module A-121-3 is functionally nearly identical to module A-121-2. Only the distances between the controls and sockets are smaller and rubberized, small rotary knobs are used. Therefore the front panel width is only 4HP compared to 8HP of the A-121-2. In the first place it is planned for applications where only limited space is available. The only functional difference compared to the A-121-2 is the missing attenuator for the resonance CV input CQ.

These are the most important features of the module:

- Voltage-controlled multi-mode filter with a cut-off slope of -12 dB / octave (identical to the filter of the Dark Energy II/III but has been expanded by the voltage controlled resonance feature)
- Four simultaneous outputs are available, each with different characteristics: low-pass (LP), high-pass (HP), band-pass (BP) and notch (N)
- Manual control Frequ. for the cut-off frequency of the filter (the cut-off frequency determines the point at which the respective filter effect appears)
- Two inputs for frequency control by means of external control voltages (frequency modulation, e.g. by ADSR or LFO):
- Control voltage input CV1 without attenuator, about 1V/octave sensitivity
- Control voltage input CV2 with attenuator FCV2 for the adjustment of the modulation depth of input CV2
- Frequency range about 10Hz ... 20kHz
- Manual control Q for the resonance of the filter
- Control voltage input CQ without attenuator for voltage control of the resonance
- Resonance up to self-oscillation, in which case the module will behave like a sine wave oscillator even without audio input signal
- Audio input In with attenuator Level for the adjustment of the filter input level (beyond about pos. 5 clipping/distortion occurs with typical A-100 audio levels)
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 1 in stock $93.23
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quote 731939
Cat: 731940 Rel: 11 Jun 19
Compact two-channel VCA - 4HP
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
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 2 in stock $75.42
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quote 731940
Cat: 577791 Rel: 10 Jul 19
VCA with exponential response for low level sensitivity - 8HP
Notes: Module A-131 provides voltage-controlled amplification. For audio signals, you would normally use the exponential VCA (A-131), and for control voltages, the linear VCA (A-130). It doesn't always have to be that way, though.

The amount of amplification the VCA's provide is determined by the voltage at the CV input, and the position of the gain control, which sets the overall gain in the system.

The VCA has two audio inputs, each with an attenuator. They are amplified by an amount determined by the combination of the gain and the two CV controls.
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 1 in stock $72.28
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Cat: 731945 Rel: 10 Jun 19
Multi-featured mixer - 6HP
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.
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 1 in stock $75.42
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Cat: 738616 Rel: 10 Jul 19
Stereo headphone amplifier - 6HP
Notes: The A-139-2 is a headphone amplifier module with two mono inputs and a stereo headphone output. It can be used for driving small loudspeakers, LED strips, small magnets etc.

- Two-channel headphone amplifier
- Two audio inputs with level controls
- Input 1 is normalled to Input 2
- Common loudness/master level control
- Headphone output (stereo 1/4" jack socket)
- Max. output power ~ 2 W per channel (@ 8 Ohm load)
- DC coupled inputs and outputs (i.e. also useful for other applications like small loudspeakers, lamps, LEDs, magnets, motors - provided that the power is sufficient)
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 1 in stock $51.33
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Cat: 738617 Rel: 10 Jul 19
Versatile module that can also be used as a modulation device - 8HP
Notes: Module A-140-1 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 time ratios for the three ranges are about 1 : 20 : 1000. The absolute Attack times are about:

20uS ... 100ms (switch position L)
400uS ... 2s (switch position M)
20ms ... 120s (switch position H)
The Decay and Release times are about 3-4 times more. Because of the exponential slope and the gradual asymptotic approach to the zero level the exact specification of the decay and real times is a bit difficult.

The voltage ranges of the ADSR outputs are about 0 ... +8V for the two normal outputs and 0 ... -8V for the inverted output.

In combination with the Comparator module A-167 a free-running "ADSR-LFO" can be realized.
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 1 in stock $74.93
Cat: 738621 Rel: 10 Jul 19
Voltage controlled envelope generator with decay parameter - 8HP
Notes: Module A-142-1 is a voltage controlled envelope generator. The only time parameter is decay (like TB303). Decay may be adjusted manually and via voltage control input (with attenuator). The envelope output is displayed with LED control. Additionally from the envelope signal a Gate signal and an inverse Gate signal with adjustable threshold is derived. LED control for Gate output. Thus one obtains a voltage controlled Gate additionally or alternatively to the envelope signal with voltage controlled duration.

The attack time is fixed to about 0.2 ms, the shortest decay time is about 2 ms. By changing the value of a capacitor the shortest time can be modified (details can be found here: A100_Capacitors.htm).

Typical applications: dynamic control of decay e.g. in combination with the Analog/Trigger Sequencer A-155, voltage controlled trigger delay functions (like A-162, but voltage controlled).
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 1 in stock $77.52
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Cat: 738632 Rel: 09 Jul 19
Quad Decay featuring four simple envelope generators - 8HP
Notes: Module A-142-4 contains four simple envelope generators. The only time parameter is Decay and can be adjusted manually by means of the Dec. control in the range 2 ms ... 2 seconds. The attack time can be adjusted internally by means of a separate trimming potentiometer for each sub-unit in the range 1 ms ... 15 ms. The factory setting is about 3 ms. This is the attack time of the TB303. Each envelope output has a LED control available. The trigger inputs are normalled (1 -> 2 -> 3 -> 4).

Suggestions for modifications:

Each sub-unit has a pin header with two pins available. When the two pins are shortened (e.g. by means of a jumper or a toggle switch connected to the two pins) the corresponding sub-unit changes to a loop mode. In this mode the unit is triggered by itself like an LFO..

By changing the value of a capacitor the time range can be modified (e.g. 0.2 ms ... 0.2 seconds or 20 ms ... 20 seconds)
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 1 in stock $93.23
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Cat: 738640 Rel: 09 Jul 19
Voltage controlled sine-LFO with four separate, phase shifted outputs - 8HP
Notes: Module A-143-9 is a derivative of our planned thru-zero quadrature VCO. It is a voltage controlled sine LFO with 4 outputs. The phase shift between the outputs is 90 degrees. The sine shifted by 90 degrees is also called cosine, the sine shifted by 180 degrees is nothing but the inverted sine, and the sine by 90 degrees is nothing but the inverted cosine.

The frequency range is from some minutes to frequencies beyond audio with three ranges selected by a toggle switch:

- Switch position H: about 30 Hz ... 3.5 kHz with the manual frequency control ("Frq."), beyond 20 kHz with additional external CV
- Switch position M: about 1 Hz ... 150 Hz with the manual frequency control ("Frq.")
- Switch position L: about 0,1 Hz ... 10 Hz with the manual frequency control ("Frq."), down to several minutes with additional external CV

Two exponential frequency control inputs are available: CV1 without attenuator and CV2 with polarizer. Consequently the module can be used even as an experimental sine VCO but does not feature an exact 1V/oct CV input! The precision CV input will be left to the thru-zero quadrature VCO.

Two LEDs display the positive and negative share of the sine output.

The core of the module is a so-called quadrature circuit that generates a sine a cosine signal with very low distortion. The quality of the sine/cosine signals are much better than those generated by a waveform converter with a sawtooth or triangle signal as starting point.

The output levels are about 5 Vss (+/-2.5V) but can be adjusted internally by a trimming potentiometer (P5 "Shape").

Typical applications:

- External sine/cosine oscillator for the frequency shifter A-126
- Modulations with pure sine/cosine waveforms
- Quadrature/barberpole effects (e.g. with the voltage controlled mixer A-135)
- Experimental sine/cosine VCO (e.g. for FM sounds)

Many users suggested to add a common output level control, i.e. four VCAs with one common control (manual + CV without attenuator + CV with polarizer) for the output levels. This is why we also designed the Quad VCA module A-132-2 with the possibility of an internal default connection to the four outputs of the A-143-9 (no soldering required, short 10 pin flat cable with removable connectors on both ends).

The A-143-9 is also a meaningful addition for the Frequency Shifter module A-126. It enables frequency shifting even below 50 Hz generating e.g. these mellow beat sounds with a few Hz frequency shifting only. The following document describes how to connect the A-126 and the A-143-9: A126_A143_connection.pdf.

The thru zero version of the A-143-9 with temperature compensation is the module A-110-4.
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 1 in stock $76.47
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Cat: 577770 Rel: 06 Jun 19
Low frequency oscillator featuring 5 different waveforms - 8HP
Notes: Module A-145 is a low frequency oscillator, which produces cyclical control voltages in a very wide range of frequencies. Five waveforms are available: sawtooth, inverted sawtooth, triangle, sine and square wave.

The LFO can be used as a modulation source for any number of modules - for instance modulating the pulse width or frequency of a VCO, modulation of the cut-off frequency of a VCF, or amplitude modulation with a VCA.

A three-way switch lets you select three frequency ranges, spanning from one cycle every several minutes at the lowest, to moderate audio frequency at the highest (about 4-5 kHz).

The LFO signal can also be synchronised, via the reset input.
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 1 in stock $63.38
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Cat: 731949 Rel: 10 Jun 19
Quad low frequency oscillator - 4HP
Notes: Module A-145-4 is a simple quad LFO (Low Frequency Oscillator). Not a very "exciting" module, just a bread-and-butter device and a simple demon for work. Virtually in every modular system several LFOs are required for modulation purposes. The module contains four simple LFOs with the waveforms triangle and rectangle. A dual colour LED (red = positive / yellow = negative output voltage) indicates the triangle output of each LFO. The frequency range can be chosen for each LFO individually by means of a jumper between about 50 Hz ... 0.04 Hz (about 20 seconds, jumper removed) and about 2Hz ... 0.002 (about 8 minutes, jumper installed).

The module can be treated as a slimmed version of the quad LFO A-143-3 as it has similar features available. 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 less than one third of the A-143-3. The module is primarily planned for applications where only limited space is available. The functional difference compared to the A-143-3 are the missing sawtooth outputs and frequency range switches.
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Cat: 738645 Rel: 10 Jul 19
Low frequency oscillator with adjustable waveform - 8HP
Notes: Module A-146 (LFO 2) is a Low Frequency Oscillator, which produces periodic control voltages over a wide range of frequencies.

The LFO can be used as a modulation source for a series of modules (for instance pulse width and/or frequency modulation of a VCO, modulation of a VCF cut-off frequency, amplitude modulation with a VCA).

Three outputs are available, with different waveforms: sawtooth / triangle; square wave, and positive-voltage square wave.

The waveform is continuously adjustable from rising sawtooth, through triangle to falling sawtooth. The same control affects the pulse width of the square wave.

A three-way switch can select one of three frequency ranges, spanning from one cycle every few minutes, at the lowest, up to audio frequency at the highest.
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 1 in stock $65.99
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Cat: 745775 Rel: 10 Sep 19
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.
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 1 in stock $67.04
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Cat: 745777 Rel: 10 Sep 19
Expansion module to the A-149-1
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.
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 1 in stock $54.48
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Cat: 745778 Rel: 10 Sep 19
Two independent voltage controlled switches in one module - 4HP
Notes: Module A-150-1 (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).
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 2 in stock $52.37
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Cat: 745789 Rel: 10 Sep 19
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.
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 1 in stock $99.52
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Cat: 577759 Rel: 10 Sep 19
Additional 4HP module for the A-160
Notes: Module A-161 is an eight-step Clock Sequencer which is internally connected to the Clock Divider (A-160). Eight outputs are sequentially switched by the clock signals from the A-160 (see Fig. 1) and can act, for instance, as sequential rhythmic triggers for an envelope. The reset on the A-160 also works on the A-161 (instant return to Step 1). The low/high levels of the output signals are 0V and about +10V. In combination with a mixer (A-138) short analogue sequences can be generated. Our MIDI-Analog-Sequencer MAQ16/3 is suitable for MIDI-controlled analogue sequences up to 48 steps. A "real" analogue sequencer with 8 steps is the A-155.
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 1 in stock $61.80
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Cat: 745790 Rel: 10 Sep 19
8HP dual trigger delay for Eurorack
Notes: Module A-162 contains two identical circuits that generate a trigger signal with adjustable delay and length from an incoming rectangle signal (e.g. gate, trigger, rectangle output of an LFO or VCO). The rising edge of the incoming signal is used to trigger the new trigger signal. This module makes it possible to delay the onset of a trigger pulse, and also change its length.

On each of the two units, two controls can alter the onset time and duration of triggers, from about 2 ms up to more than 10 seconds. A control LED shows the generated signal.
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 2 in stock $61.80
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Cat: 745791 Rel: 10 Sep 19
Simple & effective voltage-controlled frequency divider - 8HP
Notes: Module A-163 is a voltage controlled audio frequency divider. The frequency of the input signal (preferably the rectangle output of a VCO) is divided by an integer factor N (N = 1, 2, 3, 4 ... up to 32). N can be adjusted manually and modulated with an external control voltage (e.g. from LFO, ADSR, Random, MIDI-to-CV, Theremin, Light-to-CV, analogue sequencer) with attenuator. The control input has polarizing function, i.e. the manually adjusted dividing factor can be modulated upwards or downwards. The basic idea of a polarizer is described in the modules A-133 Voltage Controlled Polarizer and A-138c Polarizing Mixer.

The output waveform is rectangle with 50% duty cycle. Unlike the A-115 with fixed dividing factors (2, 4, 8, 16) the dividing factor of the A-163 is voltage controlled and can be any integer value between 1 and about 20 (but only one output). In contrast to A-113 the dividing factor of the A-163 is voltage controlled and the output waveform is rectangle (the A-113 has 4 sawtooth outputs with 4 adjustable but not voltage controlled dividers).
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 1 in stock $75.43
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quote 745791
Cat: 745792 Rel: 10 Sep 19
Dual trigger modifier, consisting of two trigger inverters for gate, clock or trigger signals - 4HP
Notes: Module A-165 (Dual Trigger Modifier) contains two separate trigger modifiers, to use with logical/digital levels (gate, clock, trigger). Each half of the module enables signals generated by the A-100 to communicate with other instruments (such as an external sequencer) or is simply used where you want to reverse a trigger polarity.

Whatever signal is patched into the input, inverted by the module, and fed out of the Inv. Out (inverted output) socket. At the same time, a trigger signal of roughly 50 ms is generated every time an edge of the trigger pulse is sensed (negative as well as positive). This trigger signal is available at the +/- output.

Two LEDs act as indicators showing the level of signal available at the two outputs.

When both units are daisy-chained the module can be used as level shifter for gate/trigger/clock signals (from min. +2,5V up to +12V)
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 1 in stock $58.67
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quote 745792
Cat: 731951 Rel: 11 Jun 19
Quad passive switch - 4HP
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.
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 2 in stock $57.61
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quote 731951
Cat: 577762 Rel: 06 Jun 19
4 channel mixer - 8HP
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-138a version features potentiometers with linear response, so especially suitable for control voltage mixing.
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 2 in stock $55.52
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quote 577762
Cat: 577792 Rel: 06 Jun 19
Electronic switch with up to four steps - 4HP
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).
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 5 in stock $58.66
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quote 577792
Cat: 577765 Rel: 10 Sep 19
Frequency divider for clock, trigger & gate signals - 4HP
Notes: Module A-160 is a frequency divider for clock/trigger/gate signals, designed to be a source of lower frequencies, particularly for rhythm uses. The Trigger input will take clock signals from, e.g. an LFO, MIDI sync, or the gate from a MIDI-CV interface.

At the outputs, you have access to the sub-divided clock signals, from half the clock frequency down to 1/64. The low/high levels of the output signals are 0V and about +10V.

The A-160 also has a reset input. Whenever a reset signal is sensed, all outputs are set to zero, until the reset voltage disappears.

The Clock Divider can be used in combination with the A-161 Clock Sequencer to produce stepped sequences with a length of from one to eight events.
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 1 in stock $69.14
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quote 577765
Cat: 742136 Rel: 10 Sep 19
Buffered precision multiple - 4HP
Notes: Erica Synths Black Multi is highly accurate active buffered 2x1to3 or 1to6 multiple that will work for signal splitting in any circuit, including driving several VCOs in tune from one CV source. "Octave" or +/- 1V offset switches on both channels allow to add or subtract one volt form each channel thus transposing VCOs one octave up or down. Hidden feature - custom offset - allows to set user defined offset on the first channel.
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 3 in stock $77.52
Cat: 732847 Rel: 22 Jul 19
LFO + highly stable S&H in one module
Notes: Erica Pico LFO/S&H is a full analogue modulations source - LFO and Sample and Hold - to provide some controlled randomness to your modular setup.
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 4 in stock $88.00
Cat: 738520 Rel: 22 Jul 19
3 channel mixer - 3HP
Notes: Pico Mixer is simple 3 channel DC coupled mixer intended to mix AUDIO SIGNALS AND CV SIGNALS in order to obtain complex modulations. Also it may serve as CV AND AUDIO attenuator.
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 1 in stock $59.71
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Cat: 732852 Rel: 27 Sep 19
Ring modulator with internal oscillator
Notes: Erica Pico Ring is a balanced modulator (quadrant multiplier) circuit to create bell-like, metallic or robotic sounds. It has built-in sine-wave modulation oscillator for more versatility.
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 1 in stock $95.33
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Cat: 732845 Rel: 22 Jul 19
Simple 2-4 step sequencer - 3HP
Notes: Pico SEQ2 is a straight-forward, full analogue 4 step sequencer/waveshaper with adjustable sequence length. If you want to have a simple, compact stepped modulation source in your setup, then this is it! Particularly interesting use of the Pico SEQ2 is waveshaping - just apply any audio source to the CLK IN, tweak the knobs and be amazed!
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 2 in stock $91.14
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Cat: 732849 Rel: 10 Sep 19
Compact & flexible looping AD/ASR envelope generator - 3HP
Notes: Erica Pico VC EG is versatile looping AD/ASR envelope generator with voltage control over attack and decay times. It has automatic Trigger/Gate detection, as well as "drone mode" - at full CW setting of the Decay knob, the envelope is full open. In the LOOP mode you can retrigger envelopes for even more interesting modulations.
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 2 in stock $99.53
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Cat: 746964 Rel: 17 Sep 19
Synth module featuring two separate voltage processors
Notes: The upper voltage processor features four inputs which are mixed and inverted at the output. Inputs 2 and 4 have their own attenuator. Input 2 is normalised to a positive fixed voltage source, which may be attenuated, and appears inverted at the output, useful for applying negative offsets.

The lower voltage processor features two inputs which are mixed and inverted at the output. Input 2 has its own attenuator. Input 2 is normalised to a negative fixed voltage, which may be attenuated, and appears inverted at the output, useful for applying positive offsets.
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 2 in stock $86.96
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Cat: 744065 Rel: 17 Sep 19
4 input audio & CV mixer
Notes: Volts Platz has 4 inputs with attenuators. Input 3 is normalled to +ve for positive offsets (up to +8V), input 4 is normalled to -ve for negative offsets (down to -8V).

The first opamp stage now includes a switch to select x1, x2 or x10 amplification. You can take a direct (inverted) output from this stage.

The second opamp features switchable clipping diodes (LEDs) which clip anything above/below +/-5V. So 'normal' Euro signals go through unaffected. Flick the amplification switch and things gets dirty.

Patch a post-VCF signal into input 1. You can then use a combination of offsets at inputs 3 and 4, and CV into input 2 to explore modulated symmetric and asymmetric clipping.

Scale, offset, amplify, clip. Or just use it as a 4 input mixer.
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 1 in stock $86.95
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Cat: 720431 Rel: 28 May 19
MIDI interface for the TRAX! sequencer - 3HP
Notes: The MIDI BUS was designed to be a MIDI interface for the Eurorack system, and more specifically to offer MIDI inputs and outputs for the TRAX performance sequencer.

This device provides opto-isolation of the MIDI input and buffers all MIDI signals.

The MIDI BUS provides MIDI IN/OUT/THRU inputs and outputs on 3.5mm TRS jacks. Three 3.5mm to 5-pin DIN MIDI cables are included with each MIDI BUS product. These MIDI cables conform to the TRS MIDI B Spec Class, currently supported by Arturia, Novation, and 1010 Music devices.

The MIDI BUS uses the power bus cable to receive and transmit MIDI at the +3.3 volt standard. In order to do this, the MIDI BUS repurposes what the Eurorack standard defines as the INT GATE line of the power bus for MIDI IN signals, and the INT CV line of the power bus for MIDI OUT signals.

To prevent conflicts with other signals that may be using these lines of the power bus, we recommend using the special MIDI BUS power cable provided with this unit, or our optional Flying Bus power cable when using the MIDI BUS with the TRAX product or any other products using this new MIDI standard.

The MIDI BUS power cable that is provided with your MIDI BUS will allow only a single device in your system to send and transmit MIDI.

The optional Flying Bus power cable allows multiple modules connected to this cable to share MIDI data with one another and also receive the proper power from the system, without connecting MIDI signals to other modules in your system.
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 1 in stock $68.09
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Cat: 739138 Rel: 16 Jul 19
Voltages expander for Permutation - silver faceplate, 6HP
Notes: Variant is an expander module based on the original Voltages expander for the Turing Machine. Variant adds two additional bipolar CV outputs (with modulation inputs) that are derived from Permutation's gate sequence.
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 1 in stock $87.99
Cat: 731217 Rel: 18 Jun 19
Expander for Quad Operator's algorithm functionality - 4HP
Notes: Where the unexpanded Quad Operator maintains a one knob per function design discipline, we nevertheless recognized the value of some more advanced algorithm-oriented functionality.

The Algo expander for the Quad Operator provides:

- Saving and loading of modulation send knob positions for FM algorithm design reuse

- Crossfade between pairs of saved algorithms, or a saved algorithm and the live knob positions
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 2 in stock $91.14
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Cat: 695619 Rel: 16 Sep 19
Analogue 24db lowpass filter - 8HP
Notes: The 24dB VCF SSI is a voltage controlled analogue low pass filter module with the new SSI2144 chip. In addition, it has a 12dB output that works either as a low pass or bandpass (+/- 12dB). There are two inputs, one with attenuator. Another CV input with attenuator is available for the cut-off frequency. The resonance is controlled either via a controller or via another CV input with attenuator.

The power consumption is +/- 30 mA. The module has a width of 8 HP (40 mm).
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 2 in stock $71.23
Cat: 695604 Rel: 16 Sep 19
MFB-522/Tanzbar style analogue bass drum module
Notes: The Bass-522 module is based on the 522 circuit and offers a punchy attack, long decay and wider pitch range. Adjustable noise and pitch envelope have also been added.

The sound can be triggered by Gate, M-Bus and signals like piezo pickups, dynamic mics and drum pads. The Sense parameter decides the sensibility and dynamic of attack, amplitude. decay and pitch.

The following parameters are available and can be controlled by CV:

TONE dampens the attack transient.
DECAY sets the release time of the amplitude.
TUNE defines the basic pitch from around 35 to 70 Hz.
PITCH controls the amount of pitch envelope.
NOISE mixes the noise floor (no CV control).

The module offers the new developed M-Bus connector which means you can you control everything via MIDI/CV interface or the new MFB SEQ-01 Pro Drum Sequencer without additional patching. The following addresses are supported:

Trigger with Velocity - MIDI Note #35 or #36 (switchable) and controller values for Tone, Decay, Tube, Pitch and Noise Decay.

The module has a width of 8HP (40mm).
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 5 in stock $82.77
Cat: 695607 Rel: 16 Sep 19
Clap module based on circuit designs of the MFB-522 & Tanzbar Lite
Notes: The Clap-522 Modul contains an enhanced circuit of the MFB-522 and Tanzbar Lite. You can edit and modulate the sound in a wide range.

As modular concept you have the possibility to control the parameter PUSE, SNAP, ATTACK, DECAY and FILTER via CV-signals from Envelopes, LFOs and Step Sequencers.

The parameters are in detail:

PULSE is the amount of claps between 1 and 7.
ATTACK sets the noise level between the clap repetitions.
DECAY controls the release of the noisy reverb.
FILTER defines the colour of the noise floor.
WIDE edits the gap between the single claps.

Beside sequencer generated analogue and digital trigger-signals, drum pads, piezo pickups and dynamic mics may also be used. Here the SENS controls allow individual adjustment of the input sensitivity. Dynamic trigger also changes the volume of the clap.

The module provides the new developed M-Bus connection. MIDI signals can control following destinations:

Trigger MIDI Note #39 or #82, switchable, with Velocity. Controller values for Wide, Attack, Decay and Filter.

The module has a width of 8 HP (40mm).
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 1 in stock $91.15
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Cat: 695610 Rel: 16 Sep 19
Stereo drum mixer - 12HP
Notes: The DRUM-99 module is an audio-mixer that has been designed for the modules of the MFB-DRUM series but also for usage with other manufacturer's modules. When using multiple drum-modules in a modular system, the following processing stages like filters or VCAs often lack enough audio inputs. To route a complete drum-set through a filter, a separate mixer like the DRUM-99 comes handy.

DRUM-99 offers five monaural inputs with individual level control. Tiny trim-controls are used to set the channel panorama position for the internal stereo-bus.

A fixed level stereo-input can accommodate the signal of one or more additional DRUM-99 modules. These inputs can also be used with the DRUM-06 module (Tom Tom) that also offers a stereo-output.

All five mono signals and the stereo-input are routed to the stereo-output that can be connected to two VCAs, filters or other sound manipulating devices. The output may also be used to connect the DRUM-99 to a mixing-console or audio-interface.

The stereo-output is designed for a possible summing with additional stereo-outputs.

The module has a width of 12 HP (60mm).
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 1 in stock $72.29
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Cat: 695615 Rel: 16 Sep 19
Classic envelope generator - 8HP
Notes: The ADSR module is a voltage-controlled envelope generator. Normally, the characteristic is logarithmic, but a linear part can be added. With the help of the loop button, the envelope can also be used as an LFO, then Attack and Decay determine the frequency that goes far beyond 100 Hz. Another special feature is the CV inputs for Attack, Decay and Release. This can be used e.g. control or modulate the times externally. In addition to the normal output, there is an inverted output in parallel.

The power consumption is +/- 30 mA. The module has a width of 8 HP (40 mm).
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 1 in stock $78.58
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MFB VC LFO Module (synth module)
Cat: 695621 Rel: 16 Sep 19
Voltage controlled LFO, switchable to oneshot mode
Notes: The module VC LFO accommodates a slowly oscillating oscillator, which is primarily used for modulations. It has five waveforms, CV input with attenuator and a control range from 10 seconds to 100 Hz. In addition, the LFO has its own reset input, over which the waveform is restarted. If you set the speed accordingly and have a separate reset pulse, you can synchronize the LFO with a sequencer. The following waveforms are available: rising sawtooth, triangle, falling sawtooth, rectangle and sample & hold.

The output voltages are maximum +/- 5 volts. The module has a width of 8 HP (40mm).
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 4 in stock $71.24
Cat: 695617 Rel: 16 Sep 19
Analogue VCO, switchable to DCO
Notes: The VCO/DCO is a voltage controlled analogue oscillator module. This can also be used as a DCO, eliminating the need for heating and temperature sensitivity. All functions except for the FM input are also available with the DCO. Sawtooth, triangle, rectangle and pulse are available as waveforms, with soft switching between the individual waveforms. This can also be done with a control voltage, so you have additional PWM modulation.

The power consumption is +/- 30 mA. The module has a width of 8 HP (40 mm).
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 1 in stock $95.34
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Cat: 719650 Rel: 03 Sep 19
Analogue 16-step CV sequencer
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).
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 1 in stock $86.95
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quote 719650
Cat: 751442 Rel: 17 Sep 19
B-STOCK: Box opened, product in perfect working order
Notes: ***B-STOCK: Box opened, product in perfect working order***

TOPOGRAF is a drum sequencer with three tracks, that works with a "topographic" principle; it contains a number of drum patterns arranged in a "virtual map"; and with two knobs MAP X and MAP Y you can set a position in this map. With one knob per channel the density is defined; and a CHAOS knob brings some randomness into the whole process. All in all, a few knobs for a lot of drum patterns you probably wouldn't make this way by yourself - a nice source of inspiration and also great for playing live.

TOPOGRAF is the AE modular version of the Grids module by Mutable Instruments. It is 100% identical to Grids.
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 1 in stock $69.51
Cat: 719652 Rel: 02 Sep 19
4-track, 16-step trigger sequencer
Notes: TRIQ164 is a 4-track, 16-step trigger sequencer.

Four track buttons select the track to be edited; with 16 buttons each step of the track can be activated an is then displayed by an LED.

For each step in each track a "repeat" can be activated, resulting in repeated triggers within one step. The number of repeats can be selected from one to eight by the REPEAT knob. Additionally, the repeat count can be CV controlled by the REPEAT CV input.

The inputs MUTE 1/2 allow to mute the outputs 1 and 2 by an external signal (e.g. for muting a kick drum)

Each of the 16 steps has a separate trigger output for additional control for certain steps or limiting the sequence length by connecting one of the outputs to the RESET input.

Use it for any kind of rhythmical patterns, typically for triggering drum sounds or envelope generator!

No, it has no pattern load/save features; this will be part of a future, much more complex sequencer. TRIQ164 is designed as improved replacement for the STEP10.

Width: 2U
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 3 in stock $52.37
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Cat: 725794 Rel: 15 Apr 19
10HP Eurorack CV modulator module
Notes: MISO is a multipurpose utility module, a laboratory for synthesizing control voltage signals and audio. MISO combines multiple CV tools into one module for making complex CV shapes at the output stage. The name comes from the four main functions available: Mix, Invert, Scale, and Offset.

MISO's 2 sections (1/2 IN and A/B IN) are identical. Each section has two inputs that can be used to Mix signals, Invert polarity/shape, Scale magnitude and Offset voltage. Each function can be used independently or simultaneously with the total shape summed to the mix output.

At the centre of the module is another processor, an accurate smooth linear voltage-controlled crossfader that mixes equally between the outputs of the top and the bottom MISO sections. Feed the MISOs with envelopes, LFOs, Sequences to create new shapes and then crossfade them manually or with CV using the centre section for even further complexity of shapes and animation of control signals. Crossfade between the waveforms of a VCO or audio samples with CV for more motion.

There are an endless number of ways to patch MISO with unexpected and inspiring results. MISO is the kind of module that gives modular synthesizers its incredible replay value, rewarding hours of creative explorations and its experimental and non-traditional mixing.

MISO offers a lot in a small comfortable module that matches Tiptop's system look with clean white faceplate styling. A red/yellow indicator light next to each section makes it easy to see signals and visualize polarity.
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 3 in stock $93.23
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Cat: 718920 Rel: 23 Apr 19
Expansion module for Zadar - 3HP
Notes: An expander for Zadar, adding one more assignable input for each Zadar channel and manual triggers.
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 8 in stock $54.47
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