Effects 3xeq / triple tilt eq / 4 HP ⇣ 3xEQ presents a row of three "One Knob" Tilt EQs, accompanied by an extra Mix Output. This module offers a streamlined solution for shaping waveforms, enriching basslines, refining hats and noises, and harmonizing elements within your mix. 1/3 key features 3x Tilt EQ Change Low and High Frequencies with just one Knob Mix Output Input Normalization for parallel EQíng Wrong Polarity Protection specs & downloads width: 4 HP depth: 28 mm power: 26 mA @ +12V / 24 mA @ -12V documentation videos description / manual Each EQ will boost high frequencies and cut low frequencies when turning the pots clockwise and vice-versa when turning them counter-clockwise. Each input can be processed individually, but you may also take the sum of 2 or all three eq´d inputs from the Mix Output. The first Input is normalised to the other two inputs. Thus its possible to use all three EQs on one signal in parallel. prev Up next

Effects gritzner / pt2399 delay with two switchable inputs and internal lfo / 8 HP ⇣ GRITZNER Delay is a special kind of module that is able to make all sorts of weird delay sounds, from chorus like effects to total destruction of the original signal. There are no boundaries for your crazyness here. Though the two switchable inputs and the LFO reset always make its output fit into a rythmical pattern of your patch. 1/3 key features PT2399 Delay Two Switchable Inputs, one High-Pass-Filtered Internal LFO for Input Switching Internal LFO for Delay Time Changes LFO with Attenuator and Reset Delay Time CV Input Skiff friendly Wrong polarity protection specs & downloads width: 8 HP depth: 28 mm power: 50 mA @ +12V / 30 mA @ -12V documentation videos description / manual GRITZNER is a short delay with two individual inputs that may be activated alternativley either by hand or with a gate signal. IN A is a standard audio input whereas IN B is a high pass filtered input. Frequencies below 320hz will be filtered out which is quite handy for some delay settings. If the MAN/LFO switch is on the left you can switch between both inputs manually using the A/B MAN switch. If the MAN/LFO switch is in the right position an internal square wave LFO automatically switches between both inputs according to the LFO range set with the help of the LFO potentiometer. Alternatively you may patch an external gate signal (from a sequencer for example) into GATE A/B in order to switch between inputs. The Delay itself is a classic PT2399 delay with its very special touch and a delay time ranging from 30-190mS. It has manual controls for the Delay Rate (going beyond the ICs operation range), Feedback and Wet. The delay rate can be voltage controlled with an external signal or with the help of an internal LFO. You can choose between a triangle and a square wave LFO and you may attenuate its signal with the LFO ATT attenuator. On top the LFO is resettable via the LFO RST input in order to get delay changes in a rythmical manner. The LFO rate can be adjusted with the LFO potentiometer. prev Up next

Mixer & VCA vca / simple vca with two attenuated cv inputs / 3 HP ⇣ "You can never have enough VCAs!" 1/3 key features Voltage Controlled Amplifier Volume Control 2x CV Input 2x CV Attenuator Wrong polarity protection Skiff friendly specs & downloads width: 3 HP depth: 25 mm power: 25 mA @ +12V / 10 mA @ -12V documentation videos description / manual VCA is a simple Voltage Controlled Amplifier with two CV Inputs. Both Inputs can be used at the same time to have Volume Control over the other CV signal. Each CV signal may be attenuated with a potentiometer. The Volume potentiometer will decrease or increase the volume of the audio signal being fed into the input Jack. An LED is indicating the current volume. prev Up next

Modulation & Random hapha / compact locked random voltage / 3 HP ⇣ HAPHA is a valuable tool for enhancing the organic and enjoyable qualities of your patches. This module generates a synchronized random voltage, tied to an external clock signal, and offers the option to stabilize this voltage into a fixed sequence. It's particularly useful for controlling filters and other sound-shaping parameters in your modular system. 1/3 key features Random Gate and CV Clock Sync Lock CV and Gate to a Sequence External CV Input Skiff friendly Wrong polarity protection specs & downloads width: 4 HP depth: 30 mm power: 25 mA @ +12V / 18 mA @ -12V documentation videos description / manual The idea was to generate random sequences by turning a knob. When you turn the LCK knob, a voltage between roughly +9V and -9V is passed to a shift register with an R2R digital-to-analogue converter, which stores the voltages from the pot with each clock signal. Depending on how the control is turned (range and speed), different voltages are sampled, resulting in a different CV and gate sequence. The SER input allows the use of external voltages which are passed to the shift register (mixed with the voltages from the potentiometer). The switch enables or disables the external voltage from the SER input. To use it, simply connect a clock signal to the CLK input. HAPHA will then produce a random GATE signal at the upper output socket and a random CV signal at the lower output socket. You can create and lock a new sequence of voltages and gates by adjusting the LCK knob, and an LED indicator will show when a voltage change occurs. For additional control, if you move the SER switch to the right, you can patch an external voltage (audio or CV) into the serial input SER which will directly influence the random voltages at the outputs. With an external voltage patched, you can still change the sequence by turing the LCK pot. prev Up next

Filter & EQ dirty dan / 3-channel vactrol-based analog filter and distortion / 10 HP ⇣ Meet Dirty Dan, the eurorack rebel who doesn't play by the rules of clean and tidy. Dan's all about embracing the mess, dishing out gritty goodness, and making those pristine waveforms second-guess their existence. If your sound needs a touch of snotty charm, Dan's your man. Just remember, he's not just dirty – he's delightfully disruptive! DIRTY_BACK.jpg 1/3 key features Vactrol-Based Analog Filter Three Channels Separate Distortion Stage High Pass and Low Pass Cutoff controls High Pass and Low Pass Two Clipping Modes Feedback Control Skiff Friendly Wrong Polarity Protection specs & downloads width: 10 HP depth: 32 mm power: 58 mA @ +12V / 54 mA @ -12V documentation videos description / manual The module has three input jacks. The first two inputs are directly connected to the vactrol filter. The third input first goes through an additional diode-distortion circuitry and is then connected to the vactrol filter. Each input jack has a dedicated volume control potentiometer. Hence you may use Dirty Dan also as a Dirty Mixer. The amount of distortion for channel IN 3 can be set with the DIST potentiometer. Additionally soft and hard clipping may be activated with the switches DIST SOFT and DIST HARD. It´s best to use a sine wave to hear the differences between the clipping modes. The distorted signal can be taken from the DIST OUT jack separately and is then being disconnected from the vactrol filer and the other two inputs respectively the OUT jack. This allows you to process the distorted audio with external modules. The filter itself is vactrol-based and has it´s own nature. The sound varies depending on the vactrols being used. It´s fine to solder retail vactrols like the VTL5C series, but the fun starts when DIY vactrols are being used. The sound from the inputs will go through a high pass filter, that can be set with the HIGH PASS potentiometer. Also a low-pass filter will take effect. This can be controlled with the CUTOFF pot. This pot is not called low-pass as you might expect, because the HIGH PASS settings directly influence the CUTOFF pot. If the HIGH PASS knob is fully counter-clockwise, CUTOFF acts as a classic low-pass filter knob. If you turn HIGH PASS clockwise the CUTOFF knob will also act as a high-pass filter in some knob settings turning it further than 12 o´clock. This way you can blend between low-pass and high-pass with one knob, the CUTOFF knob. Either low-pass or high-pass may be CV controlled. A third CV input controls both at the same time. The level of control voltage for CV H/L may be varied with the CV H/L attenuator potentiometer. The FDBK potentiometer sets the amount of audio being fed back into the filter circuitry providing a nice resonance to the signal. The range of feedback amount can be set with a trimmer on the back of the PCB. prev Up next

Mixer & VCA spm / 3-channel spread mono mixer / 4 HP ⇣ SPM becomes particularly valuable as it enables the dispersion of two mono signals throughout the stereo field within an audio mix. This capability proves instrumental in tidying up the overall mix, resulting in a more expansive and enjoyable auditory experience for listeners. 1/3 key features Analog Mixer 3 Mono Channels Pan CH 1&2 with one Knob Skiff friendly Wrong polarity protection specs & downloads width: 4 HP depth: 30 mm power: 19 mA @ +12V / 11 mA @ -12V documentation videos description / manual SPM is a 3-Channel Mono Mixer with three volume potentiometers. The gain per channel can be adjusted with trimmers on the board, making this mixer suitable for line and Eurorack levels. In addition, you can pan channel 1 and 2 with the SPREAD potentiometer and thus spread both channels in the stereo field to the left and right in opposite directions. In the centre position, all channels are panned to the centre. If you turn the potentiometer to the left, channel 1 is panned to the left and channel 2 to the right and vice versa. This is very useful to quickly clean up a mix and widen the sound spectrum in the stereo field. prev Up next

Oscillator boba fat / dual analog drum generator / 14 HP ⇣ At its core, Boba Fat features two oscillators that empower producers to easily craft both earth-shaking sub-basses and delicate, enveloping kicks. BOBA_BACK_NEW.jpg 1/3 key features Analog Drum Generator Designed for Kick- and Bassdrums Two Voices: Soft Mallet and Hard Mallet Each Mallet may be triggered independently Internal LFO with Sync Volume and Boost per Voice Groove CV Input „Vari“ for Hard Mallet Mod CV Input for Soft Mallet specs & downloads width: 14 HP depth: 28 mm power: 95 mA @ +12V / 65 mA @ -12V documentation videos description / manual BOBA FAT is a dual voice bass- and kick-drum generator. The first voice "soft mallet" generates smooth and warm sounding bass and sub-bass sounds, whereas the second voice "hard mallet" is rather considered to create kick or tom sounds. The eight potentiometers on the left control the soft mallet generator. PITCH controls the frequency, LEVEL the volume and BOOST adds low frequencies turning it clockwise and reduces them turning it counter-clockwise. MOD RATE and MOD ATT control an internal LFO and its attenuation. The LFO will affect the frequency of the soft mallet voice only. Additionally the LFO can by synced to the incoming gate or trigger. TRIG SLEW acts as some kind attack control and reduces transients making it very easy to create very smooth sub-bass drums. DECAY and RELEASE control the duration of the sounds being amplified by an internal VCA. PRESENCE changes the prominence of the sound. You can adjust the response by setting a jumper on the back of the module to either FAST or SLOW, optimizing the soft mallet circuitry for sharper, plucky tones or deeper, sustained bass sounds. The three potentiometers on the very right affect the hard mallet generator. PITCH, LEVEL and BOOST have the same function as for the soft mallet part. PITCH will have a greater effect from 12 to 5 o´clock. Changes from 7 to 12 o´clock are rather subtle, but are set on purpose to add fine nuances with LEVEL and BOOST there. OUT VOL changes the overall loudness of both drums. GATE accepts any gate or trigger signal to activate the generators. A signal at only at GATE will trigger both mallets. If a additional trigger is inserted to GATE S, GATE only triggers soft mallet and GATE S triggers hard mallet separately. This way you can have individual drum tracks for both mallets creating very interesting rhythms. A CV signal at MOD CV will override the internal LFO and CV control soft mallet pitch. It doesn‘t exactly track 1V/oct, but you will be able to play some melodies. A trigger, gate or clock signal at MOD RST lets you reset the internal LFO with an external signal. Any CV signal at VARI will slightly alternate the volume or generate additional triggers for the hard mallet circuit (depending on the incoming voltage). This gives you endless ways of creating fine grooves and interesting rhythms. The circuit was designed to easily go into distortion/clipping to encounter the limits. You may be careful using LEVEL and BOOST controls. Boba Fat definitely needs some fine adjustments in order to find the sweet spots. If you feed the GATE input with a trigger at audio rate you can also use BOBA FAT as a weird sound generator or drone machine. prev Up next

Sequencer path / dual sequential switch / 10 HP ⇣ PATH proves to be an invaluable asset for distributing signals across various destinations while maintaining rhythmic coherence. It's equally adept at directing multiple CV signals to a single destination, resulting in dynamic and evolving envelopes. Remarkably, PATH also facilitates sequential audio signal routing and switching, adding to its versatile capabilities. 1/3 key features Dual Sequential Switch 2x4 bidirectional Outputs 2x1 bidirectional Inputs Reset Input Sequence Loop to 2, 3 or 4 Steps Mix Output Attenuverter for Each Side LED Indicators Wrong Polarity Protection specs & downloads width: 10 HP depth: 28 mm power: 45 mA @ +12V / 50 mA @ -12V documentation videos description / manual PATH is a dual four position switch that can be controlled with a trigger signal. Any signal that is fed to I/O A or I/O B is being supplied on one of the 4 fours I/O jacks depending on the switch position. This is an easy way to sequentially route one or two sources to four different destinations on each side. As the inputs are bidirectional you may also route 4 or 8 different signals to one or two destinations depending on the switch state if you insert signals into the eight I/O 1-4 jacks and forward the signal using the two I/O A and B jacks. When a trigger is inserted into the Trig Input the first jack I/O 1 is activated and a signal is passed through. With the next trigger jack I/O 2 is activated and so on. After the fourth jack the fist jack will be on again. If you want to shorten the sequence, you may use the switches to loop the sequence to 2, 3 or 4 steps on each side individually. A trigger on the Reset Inputs will reset the sequence to the first step independently for each side. Additionally the Inputs I/O A and B or the currently active I/O 1-4 jacks will be supplied on the Mix Jack depending on the direction you have patched. Each side may be attenuverted using the the potentiometers on top. An LED is indicating the currently mixed signal. prev Up next

Sequencer chasing lights / analog rhythm sequencer / 22 HP ⇣ Discover the comprehensive capabilities of chasing lights, a fully-featured analog trigger sequencer boasting 3 channels and 8 trigger steps per channel, channel chain and a clock divider. 1/3 key features 3x8 Steps Analog Sequencer 8 Trigger or Clock Outputs Clock Divider Channel Chaining Sum Output and B/C Swap Wrong Polarity Protection specs & downloads width: 22 HP depth: 28 mm power: 75 mA @ +12V / 48 mA @ -12V documentation videos description / manual CHASING LIGHTS is a 3-channel analog trigger sequencer with a total of 8 trigger or clock outputs. Each channel has 8 trigger steps that can be activated or inactivated with a push-button per step. LEDs indicate if a step is active and which step is currently playing in a sequence. The trigger signals are available at the output sockets A, B and C. Each sequence can be clocked at its own external clock rate. The A CLOCK input is normalized to the other clock inputs and also to the CLK THRU output to sync CHASING LIGHTS to other sequencers. In addition one CV RESET function is available per channel. The RST ALL button can be used to manually reset all sequences to the first step. It can also act as a HOLD function as long as the button is pressed or the CV input is high. This is especially useful if you want to change the sequence lengths spontaneously. The A/B/C LENGTH switches can be used to set three different lengths per channel. 2/3 and 8 for channel A, 5/6 and 8 for channel B and 5/7 and 8 for channel C. All channels are summed at the SUM output. Each channel can be enabled or disabled for summing using the A/B/C SUM switches. Outputs B and C can be swapped with the SWAP B/C button to create rhythm variations. Wait! No mutes? To have less HP and a better practical experience, the channels should be muted using external modules with on/off switches (such as the vactrol mute ONCE IN A WHILE) or mixers (like PHOEBE, SUM2 or STEREO SUM). The A CLOCK input is also routed to a clock divider. Three divider outputs provide six different clock divisions and can be switched off in the centre position of the corresponding switches. With CLK VARI the counting direction of the internal divider can be changed by CV. This can be used to create interesting clock changes. Channel CHAIN is one of the most interesting functions of CHASING LIGHTS. It is possible to chain all three channels one after the other to create sequences up to a length of 24 steps. There is also an external input CHAIN EXT that can be included in the chain creating even longer sequences. You can set the chain length from 2 to 4 steps, with 2 chaining only channel A and B and 4 steps chaining all channels plus the external input. You can control the speed at which the channels are chained one after the other manually or by CV. It is also possible to reset the chaining sequence to channel A by pressing the CHAIN RESET button or using control voltages. CHASING LIGHTS QUICK START GUIDE: CHASING_LIGHTS_QUICK_START .pdf Download PDF • 1.66MB prev Up next

Utilities & PSU da / dual attenuverter and offset / 3 HP ⇣ DA provides two channels of audio/CV processing with the help of two active attenuverters. 1/3 key features Dual Attenuverter Dual -5V to +5V Source Offset and Mixer LED CV Indication Wrong polarity protection specs & downloads width: 3 HP depth: 25 mm power: 12 mA @ +12V / 12 mA @ -12V documentation videos description / manual Unconnected inputs are normalized to an internal +5V constant voltage, which is very helpful to apply a specific voltage from -5V to +5V to another module´s CV input. The output of the first channel is da isy-chained to the second, allowing the 2 channels being mixed together. The second channel may act as an offset for the first channel. Use this module to attenuate or mix signals, add an offset or change a CV signal´s polarity. prev Up next

Mixer & VCA fay v2 / fader, vca, overdrive, decay / 24 HP ⇣ FAY Combines four functional units in a tiny 4HP Module. It consists of a Fader, a VCA, an Overdrive and a Decay/Release Envelope. 1/3 key features Manual Fader/Mixer/Switch Voltage controlled amplifier Decay or Release Envelope Overdrive Functionality Volume Control LED indication Wrong polarity protection specs & downloads width: 4 HP depth: 28 mm power: 25 mA @ +12V / 10 mA @ -12V documentation videos description / manual If you insert two audio sources into the jacks IN A and IN B you may fade between both sources manually using the potentiometer on the bottom. This way you can either mix two waveforms or switch between them.The signal is directly routed to the VCA. Here you can control the volume or amplitude of the audio either manually or via control voltage using the CV jack. If there is a trigger signal at the TRIG input you will be able to control the VCA with the internal decay or release envelope (selectable via jumper). Simply insert a trigger signal into the TRIG jack and use the potentiometer below the LED to control the decay length. The LED indicates the current state of voltage. The envelope time can be set to 10ms or 3s via jumper. Thus is can be very snappy for percussion purposes. The decay or release envelope is also provided at the ENV OUT jack to control external modules via CV. Additionally there is an OVERDRIVE option that may be activated via switch. It is also affected by the CV input and shapes the sound to a certain extend. The OVERDRIVE is fairly subtle and more audible on short decay times. Nevertheless it really crunches up some simple waveforms. In contrast to the first version FAY Mk2 has an improved PCB layout and now only consists of one PCB to solder. prev Up next

Effects buff / analog distortion and sustainer / 4 HP ⇣ BUFF is a straightforward yet potent distortion module that can significantly enhance your sounds. It introduces a rich fuzz texture to the input signal, all the while preserving a clear bass and delightful high-frequency response. 1/3 key features Analog Distortion/Sustainer Easy to Build and Cost Effective Tone Control Sustain Control Level Control Wrong polarity protection specs & downloads width: 4 HP depth: 28 mm power: 25 mA @ +12V / 61 mA @ -12V documentation videos description / manual BUFF can turn any weak-sounding tone into an earth-shaking experience and is especially suitable for creating haedbanging techno percussions. Equipped with a TONE control for accentuating low or high frequencies, and a SUSTAIN control that facilitates the creation of a protracted and velvety sustain. LEVEL dictates the degree of distortion infused into the signal. Kindly be aware that rapidly adjusting the TONE knob may introduce a DC offset, leading to a momentary fading of the sound. Unfortunately, addressing this issue would compromise the delightful quality of the sound in its current state. Kindly decide in advance, whether you are soldering or purchasing the module, if this is a matter of concern for you. prev Up next