Analogue module composed of three drum voices - 12HP
Notes: The OH/HH/CY module is based upon the cymbal and hihat sound-circuit of the MFB-522 drum-computer, slightly modified and expanded.
The module was developed as a modular component. Therefore, the parameters decay for cymbal and open-hihat and tone can also be controlled by CV-sources like envelopes, LFOs, step-sequencers. Manual adjustment is available for the parameter tune that affects both cymbal and hihat as well as for the closed-hihat's decay.
Triggering open-hihat, closed-hihat and cymbal of the module is possible through various signal types. Besides sequencer generated analogue and digital trigger-signals, drum-pads, piezo and dynamic microphones may also be used. Here, the controls allow individual adjustment of the input sensitivity. Dynamic triggering will not only affect the sound's volume but also attack and sound length slightly. The functions in detail:
HIHAT: The hihat sound is created by several square-oscillators that are fed into a band-pass-filter. Two decay controls allow individual sound-length-adjustments for closed- and open-hihat. In addition, the decay parameter for the open-hihat can be controlled by CV-voltage.
TUNE: Sets the frequency for all square-oscillators simultaneously. Because the cymbal sound accesses the same oscillators, tune also affects this sound.
CYMBAL: The cymbal sound is based upon the same sound source as the hihat, only that it uses two band-pass-filters that individually shape the attack- and decay-phase. However, the decay parameter controls the length of both attack and sound length. This parameter can also be controlled by an external CV-source. Tone sets the balance between the differently filtered signals paths. This parameter is also under CV-control but does not offer an internal attenuator.
A specialty of the cymbal sound is its tone-input. Here, you can connect an external sound source that replaces the internal square-oscillators for the decay phase. The internal oscillators are still in use for the sound's attack-phase.
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.
10HP filter module based on the original parts of a well known Russian Synth
Notes: The Polivoks Filter Module, from Elta Music, utilizes the classic Soviet filter chip for a unique and iconic filter tone, and brings it to the Eurorack modular format. It provides two CV inputs with individual depth pots for ultimate control over cut-off frequency. One input with sensitivity control and four outputs are available simultaneously - lowpass, bandpass, highpass and notch filter types.
Polivoks filter chip with CV & Expression pedal inputs
Notes: The Polivoks Filter, from Elta Music, utilizes the classic Soviet filter chip for a unique and iconic filter tone. It provides both CV and Expression pedal inputs, built in LFO, and WOB fader for ultimate control. On board LFO has a fast/slow range switch, and on/off. Separate LFO OUT can be used to control external CV devices. With lowpass, bandpass, highpass, and notch filter types, one can shape tones into whole new realms. The pedal is switched on with a switch, rather than a stomp button, catering towards use as a desktop filter.
Polivoks-inspired module for Eurorack format - 46HP
Notes: The idea of the Polivoks Mini analogue synthesiser came into mind in 1990, as the junior version of its older brother well known Polivoks full synth. The aim was to develop a way simpler and lighter device that has less components, offers the same broad capabilities, and removes possible flaws of the Polivoks full synth. As the result of this research a new minimalistic schematic appeared. It has fewer controls that are compensated by greater functionality.
The overall design of the Polivoks Mini is made in collaboration with Ms. Olympiada Kuzmina, Polivoks full synth concept designer.
Notes: The Model 156 was likely the first "CV manipulation" tool ever available to modular synthesists. In the original 100 series environment, the 156 was used as a front end to nearly every other module with a CV input. The majority of CV inputs throughout the 100 series do not have associated attenuators or offsets built into the modules, and thus they relied on the 156 to scale, offset, and attenuate the voltages traveling around the system. The 156 consists of 2 independent "voltage processors" Each with a control to mix the two inputs, add a voltage offset (positive only), and then a control to mix between the external CV to be processed and the internal offset. In addition, the "B" channel has an inverting input. The 156 is as close a replica to the original 156 as possible, and is built entirely of discrete analogue components.
Dual sine-sawtooth generator based on Model 158 from the Buchla 100 series
Notes: The Model 158 is a dual oscillator created out of an entirely discrete transistor core. It consists of two independent and identical sides each with a front panel tuning knob, a frequency modulation input and attenuator, and a knob to fade smoothly between saw and sine waves. The RED PANEL model 158 is based off of the original "A" variant of the 158 oscillator.
The 158 was one of the very first voltage controlled oscillators ever produced. As such it contains many particular quirks/rawness of this first generation of synthesis. The exponential scaling of the oscillator is far from accurate, there is no temperature compensation, quick changes in pitch produce a slewing effect, and the saw waveform only vaguely resembles a saw wave through part of its range. It is as accurate a recreation as we believe is possible with the components available today. We performed hundreds of listening tests to find suitable replacements for obsolete transistors, and hand select multiple transistors on each individual unit to ensure that they have the proper sound.
Notes: The 156 is an accurate reproduction of the original 156, however it's accuracy also means that it's functionality is based entirely on the needs of a cohesive system designed in the mid 60's. It cannot work with negative voltages, the maximum gain is set at 1:1, and the transistor core makes it inherently nonlinear.
The 156M is a modern update of the original 156 that we feel both works within the paradigm of the original 100 series and helps to interface with modern Eurorack gear. Like the 156, the 156M consists of two independent voltage processors. Each side can mix between 2 independent control voltages. This mix can then be offset by either a positive voltage or (unlike the original) a negative voltage. The mixed and offset control voltages can then be attenuverted - which allows the user to set the gain in either a positive or negative direction and can also boost the gain to approximately 1.5x the original signal. In essence, the combination of these three facilities allow you to mix, offset, compress, expand, invert, amplify, or scale any CV source.
Dual attack generator featuring two ASR envelopes with linear voltage curves
Notes: The Model 180 is 100% discrete transistor core dual channel A/D A/H/D function generator (envelope). A trigger or gate signal greater than 2.5v at the "trigger" input causes the output CV to linearly ramp up to its maximum value at a speed set by the "attack time" pot. Once reaching the maximum CV output (set from the factory at 5v but easily adjustable via trimmer) the module will hold at this level for a static duration set by the "note duration" pot, or will hold at its maximum level as long as the trigger input is high. This behaviour is selected with the "controlled internally" vs. "controlled by trigger length" switch. At the end of the "hold" period the CV output will ramp back down to approximately 0v at a rate set by the "decay time" pot.
Like many "west coast" function generators, the envelope cannot be retriggered until the attack phase is complete, allowing for some function as a clock divider etc. The attack, hold, and decay times can be set very fast, and the module can easily create percussive blips as well as longer drawn out envelope shapes.
Notes: The Model 110 is 4 independent transistor based voltage controlled amplifiers behind one panel. Each VCA (or "gate" in the original terminology) consists of an audio input with an attenuator, a CV input, and 2 outputs. The VCA's are AC coupled - meaning that they will not pass slow (or static) control voltages. The VCA's are calibrated to unity (an input of a 10v peak to peak audio wave, will produce a 10v peak to peak audio wave at output) when 5v is applied to the CV input and the attenuator is at approximately the 3'oclock position.
Notes: Unlike the later (and better known) Model 292, the original low pass gate - the Model 110 is entirely transistor based (rather than vactrol based like the 292), and is much faster.