Modulation & Random adsr / envelope generator offdering three distinct lentgh modes / 4 HP ⇣ ADSR is a classic Envelope Generator creating an envelope with an Attack, Decay, Sustain and Release stage. 1/3 key features ADSR Envelope Generator Regular and Inverted Output Re-Trigger Input Three Length Modes Snappy from 20 micro seconds until evolving to 110 seconds Skiff friendly Wrong polarity protection specs & downloads width: 4 HP depth: 28 mm power: 25 mA @ +12V / 25 mA @ -12V documentation videos description / manual ADSR can be triggered with a Gate signal and will output the envelope with a range of 0V to +8V on the regular output jack and 0V to -8V on the inverted output jack. The envelope may be re-triggered using the RTRG input as long as the Gate on the Gate Input is high. ADSR has three different Length Modes from Slow over Moderate to Fast. The envelope can be very short (20uS) up to very long (110s) making it a useful tool for percussion like sounds and evolving soundscapes. The Moderate Mode is the best option for regular synth sounds. The LED between the A (Attack) and D (Decay) potentiometer indicates the current state of the envelope. prev Up next

Utilities & PSU cause & effect / voltage reader, sample & hold and gate switch / 4 HP & 20 HP ⇣ Introducing the Cause & Effect module – the maestro of musical mischief in your Eurorack setup. It's like the conductor of a whimsical symphony, where flipping switches and twiddling knobs creates a chain reaction that turns chaos into pure sonic magic. Who knew that cause and effect could be this much fun? 1/6 key features Three Utility Tools Voltage Reader for Gates Hold for Sampled Voltages Gate Switch Gate Switch Inverter Two Hold Modes Inputs Normalised Accepted input voltages for all inputs: -8V to +8V (CV & Audio). Available in Intellijel and Pulp Logic Tile Format Skiff friendly specs & downloads width: 4 HP & 20 HP depth: 30 mm power: 35 mA @ +12V / 31 mA @ -12V documentation videos description / manual The first unit is a VOLTAGE READER, that outputs a gate signal according to a limit set with the help of the READ LIMIT potentiometer. If the limit set (any voltage between -6V and +6V) is reached by the incoming voltage, the R GATE output will be high. The limit may also be controlled via external control voltage at the LIMIT CV jack. This so-called comparator outputs a gate with an amplitude of +/-5V, which also makes it usable as a square wave generator with pulse with modulation via the READ LIMIT potentiometer. Any voltage applied to READ IN is normalised to HOLD IN and IN A. R GATE is normalised to H GATE and SW GATE. This way only one signal is necessary to control both other units. The second unit is called HOLD. In one mode it can sample and store a voltage from the HOLD IN jack and supply it at the HOLD OUT jack, if gate at H GATE is high. In another mode it can pass through the incoming voltage when gate is high. It then samples and stores the last voltage value applied when gate switches to low. The modes are selectable via the HOLD MODE switch. The third unit is a GATE SWITCH. Apply a gate signal to the SW GATE input to route IN A or IN B to OUT. If the gate signal is high, IN A is switched through, and if the gate signal is low, IN B is switched through. When only IN A is connected and IN B is not, OUT produces an inverted version of IN A when the gate is low, and a non-inverted version when high. When only IN B is connected and IN A patched with a dummy cable (a cable that is not connected to another module), IN B can be switched off by a gate signal. If nothing is patched to IN A, the VOLTAGE READER GATE output is normalized to this input. This module is available in 3U and 1U! CAUSE & EFFECT QUICK START GUIDE : CAUSE_EFFECT_QUICK_START .pdf Download PDF • 452KB prev Up next

Sequencer push / manual sequential switch / 4 HP ⇣ This module was inspired by Make Noise „Pressure Points“, which has three rows of four tunable voltages. PUSH takes one of these rows in order to play melodies, change timbral settings of oscillators or even to store simple presets for a given parameter of any other module in an HP friendly design. 1/3 key features Manual Sequential Switch Four Voltages Loop Sequence in 2, 3 or 4 Steps Reset to Jump to Step 1 Variable Maximum Voltage via Trimmer Pot LED Indicators Wrong Polarity Protection specs & downloads width: 4 HP depth: 28 mm power: 35 mA @ +12V / 30 mA @ -12V documentation videos description / manual PUSH is a single four position manual sequential switch. There are four steps, each with a potentiometer to set a specific voltage. With a push on the PUSH button one of these values is selected and supplied at the OUTPUT jack. The sequence always starts with the first step and you may switch through the other three potentiometer/voltages sequentially. The sequence will loop when you have reached the last step and press the button further more. You can set the length of the sequence from 2 up to 4 steps. With the help of the RESET button you may jump to the first value at any given time. Additionally you can simultaneously change the maximum voltage of all four steps from 5V to 10V with the help of the little trimmer pot VR on the top. You can choose to have any voltage between 5V and 10V. Turning the trimmer pot will instantly change the value for all four potentiometers. 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

The HUM PROTECTOR HP200 is probably the most compact stereo hum eliminator on the market. It reliably protects your audio signal from any noise and hum. hum protector hp200 / hum and noise eliminator / 0 HP ⇣ The HUM PROTECTOR HP200 is probably the most compact stereo hum eliminator on the market. It reliably protects your audio signal from any noise and hum. key features 1x Stereo or 2x Mono Compact Design No Power Required Easy to Solder documents "Finally I have no more USB noise in my setup!" "I have never had such a compact and good noise eliminator." videos description / manual Offering either two mono channels or one stereo channel, the device comes in two variants. The initial version incorporates a more economical and compact SMD audio transformer, whereas the alternative version integrates larger through-hole audio transformer with marginally superior specifications. Despite this distinction, both iterations are recognized for their commendable audio quality, exhibiting no discernible differences. From a technical standpoint, audio transformers serve to electrically isolate connected devices, effectively eliminating noise and hum in the audio signal path. The HP200 functions as a desktop unit, eliminating the need for valuable HP (horizontal pitch) in a Eurorack case. Its versatility extends to modular setups, as well as compatibility with grooveboxes, samplers, and other synthesizers, particularly those powered via USB. To eliminate hum or noise when connecting your synth to a mixer for example, just insert the HUM PROTECTOR between the devices by connecting the synth output to the HUM PROTECTOR input and the HUM PROTECTOR output to the mixer input. This should resolve the issue. You can also utilize it to eliminate noise from an audio interface by connecting it to the interface output and the monitor's input. Will there be a full size jack plug version? Probably not, as the product is designed for Eurorack and USB-controlled devices that typically use 3.5 mm jack plugs. In addition, there are already numerous versions with full-size jack sockets. Up

STEREO SUM represents a modular Eurorack stereo mixer offering a variable number of stereo or mono channels. These channels are interconnected through flying bus cables and standard ribbon cables at the rear, allowing expansion from a minimum of two channels to suit your requirements and available HP. STEREO SUM is a true performance mixer aiming to be used in live situations. stereo sum / customizable eurorack stereo mixer / 8 + 4 + N HP ⇣ STEREO SUM represents a modular Eurorack stereo mixer offering a variable number of stereo or mono channels. These channels are interconnected through flying bus cables and standard ribbon cables at the rear, allowing expansion from a minimum of two channels to suit your requirements and available HP. STEREO SUM is a true performance mixer aiming to be used in live situations. key features Stereo Mixer Customizable Amount of Stereo & Mono Channels EQ per Channel Two Send/Returns AFL Mode to Audit Sounds Mute Switch per Channel +20dB Gain per Channel Stereo Input to Integrate other Mixers Stereo Line Output Mix to Headphone Knob for Sound Comparison Skiff Friendly Wrong Polarity Protection specs & downloads width: min. 12 HP depth: 30 mm power: min. 47 mA @ +12V / 33 mA @ -12V documents videos layout suggestions description / manual STEREO SUM is a stereo mixer with a customizable amount of stereo or mono channels. Tailor your setup by selecting the desired quantity of SUM CHANNELS or MONO CHANNELS to integrate with the SUM MAIN module. Each STEREO or MONO CHANNEL has a mute switch, a one knob EQ, Pan, a Send knob that can be routed to two different destinations, a Level pot and an AFL (after fade listening) functionality, which allows you to audit your sounds on the headphones before you add them to the mix (pre Pan though). Fully counter-clockwise the channel is only routed to the headphones (AFL), turning it clockwise it will be smoothly subtracted from the headphone out and added to the main mix (Mix). The SUM MAIN module has all output, send and return jacks, a master volume knob and a 6.3mm stereo headphone jack with a dedicated volume potentiomter. The Mix to AFL knob routes the main mix output to the headphone out in order to compare the channels that are in AFL mode with the main mix. This can be deactivated with a switch to only audit channels that are currently not send to the main output (AFL mode). Additionally there is a stereo input to integrade other mixers, like PHOEBE, SUM or uSUM for example. All stereo inputs can also handle mono signals. If you want to save HP it might be a good decision to add some MONO CHANNELs to your STEREO SUM. The send channels can be set to be active either pre or post AFL per channel via a solder bridge. ‚Pre‘ means you can still hear the send/return way when it is in AFL mode (thus the channels signal is actually not audible in the main mix), ‚post‘ means send/return will only work when the channels signal is routed to the main mix. Each channel has two separate GAIN trimmer potentiometers adjustable from the front. For enhanced EQ control of your mix, consider integrating the STEREO EQ . Additionally, you can enhance each channel or the main output with the STEREO COMPRESSOR . TO ENSURE THE MIXER'S FUNCTIONALITY, IT'S CRUCIAL TO HAVE AT LEAST ONE STEREO OR MONO CHANNEL, IN ADDITION TO YOUR MAIN MODULE. Up

Mixer & VCA mix & pan / 4-channel mixer with vca, cv pan, and cv scan. / 18 HP ⇣ This module is great for creating ever-changing and organic soundscapes throughout the complete stereo field, making your composition a very varied and a persistently interesting listening experience. 1/4 key features 4-Channel Mixer 4x VCA 4x CV PAN CV SCAN CV SPAN Volume Slide Pots Wrong Polarity Protection specs & downloads width: 18 HP depth: 55 mm power: 92 mA @ +12V / 78 mA @ -12V documentation videos description / manual MIX & PAN completes the ST Modular SUM mixer series with a fully CV-controlled 4-channel mixer. It features CV PAN, VCA per channel and a CV CHANNEL SCANNER. Each channel has a VOLUME SLIDER and a VOL CV input to control the internal VCA. The panning per channelcan be adjusted with the PAN controls or the PAN CV inputs. LEDs indicate the channel volume and the stateof the panning. All channels are sum med and can be tapped at the main output jack. The SCAN and SPAN functions are really the most outstanding features of the module. They provide a unique way to mix 1 to 4 channels using one or two CV signals applied to the SCAN and/or SPAN CV inputs. The scan functionality allows you to output a selection of channels by turning the SCAN knob or applying CV to the SCAN input. The range of channels that are activated is set manually or by CV using the SPAN knob. This not only narrows down the active channels from all to just one, but also reduces the effect the SCAN CV hason the VCAs, as if you were shortening their decay time. When both SCAN and PAN are in the centre position and you turn SCAN, you activate one of the four channels at a time. If you increase SPAN, more of the adjacent channels become audible until all channels have reached maximum volume (from mid to cw position). If you decrease SPAN again, only one scanned channel will be audible (mid position) and it will then start to fade out shorter (turning from mid to ccw position). If a CV signal is present at the SCAN CV input and you turn SCAN to the left, the activated channels are narrowed to the left. Conversely, if you turn the knob to the right, only channels 3 and 4 are activated, and in the rightmost position, only channel 4. All CV inputs also accept audio signals, and it is quite interesting to control them with CVs that transition seamlessly from low frequencies to audio rates. SUM MIX&PAN QUICK START GUIDE: SUM_MIX_AND_PAN_QUICK_START .pdf Download PDF • 833KB prev Up next

Utilities & PSU pow! / usb power supply unit / 3 HP ⇣ POW ! is a 3HP USB Pow er Supply Unit for Eurorack. 1/3 key features USB PSU for Eurorack 300mA +12V 150mA -12V 500mA +5V from USB On/OFF Switch LED indication Skiff friendly specs & downloads width: 3 HP depth: 25 mm power: +5V USB-C Power documentation videos description / manual With this compact module, you can conveniently energize your Eurorack modules using any +5V USB power source. Just plug in a C-Type connector to the USB jack, and you'll have a generous 300mA +12V and 150mA -12V available through the 2x5 male header on the PCB's underside. Remember to have a power cable with 2x5 female connectors at both ends. Control the power flow with the built-in switch, with an LED indicating the current status. Tailored for modest power needs in compact setups, this Power Supply Unit is designed to accommodate one or two modules in small cases. prev Up next

Mixer & VCA μ sum / moog cp3 based 3-channel analog mixer with eq & mute switches / 8 HP ⇣ μSUM is the successor of KNEAD and has an improved circuitry and PCB layout. It was inspired by the famous MOOG CP3-Type Mixer. The circuit adds some nice harmonic distortion to the signal with heavy clipping, if the inputs are turned to the maximum. As the mix is bussed passively turning one input up may result in a reduction of the other inputs. Therefore the output cannot exceed any other input´s level providing auto-leveling on high volumes. 1/3 key features CP3 Transistor-Based Analog Mixer 3 Audio Channels 3x EQ 3x Mute Switch 3x Signal LEDs MIX Volume Skiff friendly Wrong polarity protection specs & downloads width: 8 HP depth: 30 mm power: 56 mA @ +12V / 45 mA @ -12V documentation videos description / manual There are three potentiometers to adjust the LEVEL for each signal. Additionally you may change the frequencies of each channel by turning the EQ knobs. EQ will boost high frequencies turning the knob clockwise and boost low frequencies turning it counter-clockwise. On top you will find MUTE switches for easy sound comparison or live mixing. LEDs will indicate if a signal is passed through. The LED´s brightness can be set with trim potentiometers for each channel. The MIX VOL knob controls the volume of the summed signal being supplied at the OUT Jack. Knead Expander has been omitted on the μSUM Mixer. prev Up next

Modulation & Random catch / sample & hold / 6 HP ⇣ Catch is a modular swiss army knife combining a great variety of useful functions in 6 HP modular width. 1/3 key features Stepped Random Generator Sample and Hold CV Clock Generator Attenuverter Offset Noise Source LED indication Skiff friendly Wrong polarity protection specs & downloads width: 6 HP depth: 28 mm power: 38 mA @ +12V / 27 mA @ -12V documentation videos description / manual Catch serves as a modular multitool, integrating a diverse range of valuable functions: Stepped Random Generator Sample and Hold CV Clock Generator Attenuverter Offset Noise Source On top of the module you will find the clock generator with its speed potentiometer. Turning CW will increase the speed of the clocks generated. The speed range can be altered with the ON-OFF-ON switch and CV controlled via the CV jack. The clock signal is forwarded to the CLOCK OUT and to the internal Stepped Random Generator and Sample and Hold circuit. If nothing is patched into the TRIG IN jack, the clock triggers the Stepped Random Generator and provides a random voltage on the C/OUT jack. This connection will be cut in case of an external trigger signal being patched to TRIG. In case of a voltage being patched to IN, this source will be sampled and caught on trig on the C/OUT jack. Either the external or the internal voltage signal can be offset and attenuverted and will be supplied on the A/OUT jack, The left bicolor LED indicates the current voltage being adjusted by the offset and attenuverter and the right bicolor LED shows the random voltage being caught on internal or external trigger. If you patch OUT into your audio path, you will hear very warm white noise. prev Up next

Oscillator cyllene / classic analog vco with three sub-octaves / 12 HP ⇣ Presenting timeless waveforms including Sine, Triangle, Pulse and 3 Sub-Octaves this oscillator emerges as an exceptionally stable, precise, and awe-inspiring sonic source. Its brilliance truly emerges when engaged in frequency modulation. 1/3 key features Classic Analog VCO 4 Outputs: SINE, TRIANGLE, PULSE, SUB Oscillation from supersonic to sub-audible (LFO) 1V/Octave tracking Pulse Width Modulation with Attenuator Linear Frequency Modulation with Attenuator Exponential Frequency Modulation with Attenuator Integrated Frequency Divider Up to 3 Sub-octaves Attenuator for each Sub-octave Wrong Polarity Protection specs & downloads width: 12 HP depth: 28 mm power: 26 mA @ +12V / 19 mA @ -12V documentation videos description / manual Functioning as a quintessential VCO, it boasts a 1V/OCT input, both linear and exponential frequency modulation inputs, and comprehensive control over pulse width modulation. To manage incoming control voltage effectively, dedicated attenuators accompany each of the aforementioned inputs. Cyllene's oscillation spans the gamut from supersonic to sub-audible frequencies, endowing it with the versatility to serve as an LFO if desired. Beyond the realm of classic VCO attributes, Cyllene incorporates an integrated frequency divider. Through the SUB output jack, it delivers up to 3 sub-octaves in relation to the original signal. Fine-tuning the volume of each sub-octave is facilitated by the potentiometer seamlessly connected to SUB 0-8. By toggling the SUB ORIG switch, the choice between the original signal and a generated square wave on the initial octave is at your fingertips. Furthermore, the SUB WAVE Switch allows you to designate the source wave for the frequency divider. prev Up next