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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

Utilities & PSU pedal pal stereo / fx pedal integration module / 8 HP ⇣ Enhance your creative palette by seamlessly integrating your favorite guitar FX pedals into the realm of Eurorack modular. Take command over the amount and tone of the signal sent to your pedal and manipulate the expression pedal input using CV. To double the excitement, this module can handle stereo signals! 1/3 key features Stereo FX-Pedal Integration Expression Input CV Send CV Send and Return Level Controls Send Tone EQ Dry/Wet Control TRS Connections to FX Pedal Use it with Line or Modular Levels Boost Dry and/or Wet Signals with a max. Gain of +20 dB Phase Inversion Switch Skiff friendly Wrong polarity protection specs & downloads width: 8 HP depth: 30 mm power: 59 mA @ +12V / 43 mA @ -12V documentation videos description / manual Connect a stereo or mono signal to the IN sockets (a mono signal to IN L is normalized to IN R), and retrieve the output signal from the OUT jacks. Link your FX pedal's inputs to the SEND output using a TRS audio cable, and connect the FX pedal's output to the RTRN return socket with another TRS audio cable. Fine-tune the blend of dry and wet signals with the central DRY WET knob. The level gain of the dry and the wet signal can be adjusted independently via trimmers on the back of the module. Rotate SEND to the right to increase the audio level sent to the pedal's input. The attenuator beneath the SEND CV jack controls the maximum send signal level, so remember to turn it to the right to activate the SEND jack. Increase the RETURN knob to control the effect signal's level returning from the FX pedal. Be cautious as the send signal can potentially overload the FX pedal's input, so adjust the send amount with care. Both the SEND and RETURN controls provide precise control over the signals sent to and from the effects unit for clean or slightly overdriven signals. The ST Modular logo LEDs indicate whether a signal is being sent from or returned to the module. Turn the TONE knob to the right to emphasize high frequencies or to the left for low frequencies in the SEND signal. Keep it in the center position to have no further effect. Activate the PHASE button to align the audio return signal with the dry input signal if your effects pedal reverses its phase. You may need to make further adjustments to the send and return settings afterwards. The real fun begins when you modulate the amount of audio sent to the FX pedal. Simply introduce a CV signal into the SEND CV input and adjust its level with the attenuator. Furthermore, you can also control the pedal's EXPRESSION input using CV. Connect a TRS audio cable to the EXPR I/O, and the voltage provided by the pedal will be attenuated with the EXPR knob and send back to the pedal, allowing you to manually control the expression parameters. Alternatively, you can patch modular control voltage into the EXP CV input to control the expression parameters of your FX unit, with the EXPR knob acting as an attenuator. The LED indicates when voltage is being forwarded to the pedal. Please ensure you check your FX pedals' specifications before using PEDAL PAL STEREO. Verify whether the pedal supplies its expression voltage on the tip or ring of the EXPR TRS cable and the accepted voltage level (most commonly 3V or 5V). Adjust the corresponding jumpers on the back of the module accordingly. In the video example below, I'm using an EarthQuaker Devices Avalanche Run Delay and Reverb pedal, which provides 3V on the ring of the TRS expression cable. This pedal is particularly well-suited for PEDAL PAL STEREO, as it allows for quick selection of the expression voltage destination, such as reverb amount, delay time, and more. For convenient parameter adjustments, particularly during live performances, potentiometers are positioned on the lower side, ensuring easy access when the module is mounted in the bottom row of a tabletop case. If you are looking for a smaller and simpler mono version, please check out the predecessor PEDAL PAL ! PEDAL PAL STEREO QUICK START GUIDE: PEDAL_PAL_STEREO_QUICK_START .pdf Download PDF • 667KB prev Up next

Utilities & PSU uit / trs balanced output / 4 HP ⇣ UIT is a balanced output module that supplies an active output on the cold terminal of the TRS jacks, producing the same signal as the hot terminal but phase-inverted. This allows stable driving of long cables at low noise levels. It is based on high-performance, fully differential operational amplifiers and laser-trimmed thin-film resistors that exibit low noise and distortion and a wide output swing. 1/4 key features TRS Balanced Output Low Noise and Low Distortion Headphone Output Volume Control Phantom Power Protection PCB Outputs for Case Mounted Jacks Wrong polarity protection specs & downloads width: 4 HP depth: 35 mm power: 31 mA @ +12V / 25 mA @ -12V documentation videos description / manual This module offers two TRS 6.3mm jacks that provide the BALANCED OUTPUT signal and a TRS 3.5mm HEADPHONE OUTPUT. Both have dedicated VOLUME potentiometers with +6dB gain. Two LEDs indicate the level of both incoming signals. The left input is normalized to the right input if there is no signal present. The outputs are protected against unwanted phantom power voltages. There are also PCB outputs available if you want to solder case/cabin mounted output jacks directly to the UIT PCB. UIT is supposed to be the last module in your modular chain and connects the modular world with any other studio or stage input equipment. prev Up next

ST CASE is a Eurorack enclosure that you can 3D-print yourself. It is 42HP wide and can be used with M3 threaded strips that are inserted from the side. There is a cable holder on the back and the large holes on the bottom allow easy access to cables and boards for recalibration. st case / 3d-printable eurorack case / 42 HP ⇣ ST CASE is a Eurorack enclosure that you can 3D-print yourself. It is 42HP wide and can be used with M3 threaded strips that are inserted from the side. There is a cable holder on the back and the large holes on the bottom allow easy access to cables and boards for recalibration. You will need an M3 10mm screw to fixate the cable holder and four rubber feet for a non-slip stand. If you don't dare to mount your new DIY module directly into your Eurorack case, the ST Case is the ideal companion for testing newly built modules. Two Variants TYPE-A comes with a small power supply unit that users can solder themselves, and TYPE-B allows for the mounting of power supply modules from other manufacturers on the back. Inside the TYPE- A case there is space for a small USB-C power supply that delivers 150mA@-12V, 250mA@+12V and +5V (mA depends on the USB voltage used). It offers four ribbon power cable connectors. The PSU board can be purchased and soldered separately. TYPE-B has the same specifications as Type-A, but offers the option of mounting a third-party 4HP power supply module on the back of the case instead of a PSU PCB inside. This allows you to use your preferred 4HP power supply module with more power than the Type-A case PSU offers. key features 3D-Printable Low-Cost Slide-in Rail Brackets Lightweight specs & downloads Width: 42 HP Depth: 55 mm Power: PCB or 4HP Module TYPE-A (USB DIY PSU) Type-A DIY PSU TYPE-B (4HP PWR Module) Print your own! To have your ST CASE printed, you can download the STL-file below and contact your preferred 3D printing service. It is best to use PLA or PETG filaments. The average cost of printing the enclosure at an online print shop is around 30€ to 50€ (PLA; black; no finish). Local 3D printing services are often cheaper than those you find online. If you print the enclosure yourself on your own printer, it costs about 6€. The cases shown on this page were printed with PLA on a Bambu Lab X1C. DOWNLOAD STL (ZIP) Up

Mixer & VCA pae / cv pan & fade / 6 HP ⇣ PAE is a voltage controlled Pan or Fade module. 1/3 key features Voltage controlled Pan or Fade Attenuator for incoming Voltage LED Indicators Seperate single Outs for each Channel Wrong polarity protection specs & downloads width: 6 HP depth: 25 mm power: 40 mA @ +12V / 20 mA @ -12V documentation videos description / manual PAE has two inputs for two differnet mono or one stereo signal. Using the Volume potentiometer you can set the volume of each channel separately. Acccording to the potentiometer on top of the module only one or any mixture of both signals will be available at the Out jack. Simultaneously each channel can also be taken from the Out L and Out R output jacks. Additionally Pan or Fade can be controlled via voltage using theCV jack. The small potentiometer on top of the jack acts as an attenuator for incoming voltages. Two LEDs on top of the module show the current state of Pan or Fade. The module is capable of handling CV and audio. prev Up next

Oscillator honeyeater v3 / cem3340 analog vco with sub-oscillator / 6 HP ⇣ HONEYEATER is a classic analog VCO featuring two sub-oscillators and mixable waveforms. Built around the renowned CEM3340 "Curtis Oscillator" precision VCO chip — found in legendary synths like the Sequential Prophet-5 and Oberheim OB-8 — this module delivers rich and raw analog sounds in a compact, low-HP format. It is one of our most popular modules! 1/4 key features CEM3340 Analog Oscillator 5 Mixable Waveforms White Noise Two Blendable Sub-Oscillators Linear & Exponential FM VC Pulse Width Modulation Skiff friendly Wrong polarity protection specs & downloads width: 6 HP depth: 30 mm power: 56 mA @ +12V / 45 mA @ -12V documentation videos description / manual Honeyeater is the ideal choice for big sounds in compact cases! It serves as a versatile workhorse oscillator, capable of producing both classic and complex waveforms beyond typical analog oscillators. Use the COARSE and FINE knobs to adjust pitch, with FINE allowing smaller, more precise pitch changes. Increase the volume of the Pulse, Triangle, or Sawtooth waves, as well as the Suboscillators, by raising the three faders. Note that waveforms may slightly overdrive in the top third of each fader’s range. You can also switch between a triangle or sawtooth waveform for the middle fader. The SUB MIX knob controls the two sub-octaves: turning it right increases the volume of the sub-oscillator one octave below the root pitch, while turning it left boosts the one two octaves below. At the center, both sub-octaves play equally; at either end, the opposite sub is fully muted. Ensure the SUB fader (3) is raised to blend sub-octaves into the main mix. To add white noise for a grittier sound, turn the NOISE knob to the right. The Pulse Width of the Pulse waveform can be adjusted manually or via CV using the knob above the PWM CV input. Connect any CV source (0V to +5V) to modulate Pulse Width here. The FM input accepts any control voltage to frequency-modulate the oscillator, with modes switchable between linear and exponential via the LIN/EXP switch. Honeyeater supports both hard and soft sync by patching an external oscillator’s output (ideally a sawtooth wave) to the SYNC input. Select between sync types via a jumper on the back of the module. When assembling the Honeyeater yourself, you have the option to use either a DIP-16 through-hole CEM3340 IC or a SOIC-16 SMD variant, which can be mounted using a small adapter board. HONEYEATER QUICK START GUIDE: HONEYEATER_V3_QUICK_START .pdf Download PDF • 453KB prev Up next

Mixer & VCA cuerly / 3-channel stereo mixer with cue / 6 HP ⇣ Cuerly is a compact 3-channel stereo mixer with cue functionality, allowing you to pre-listen to signals before sending them to the main mix. It’s the perfect mixer for live performances in a small Eurorack setup. 1/4 key features 3 Stereo-Channels Level Control per Channel Cue Buttons for Pre-Listening Heaphone Output Headphone Level Control Mix to Headphone Control Max. Gain +20dB Wrong polarity protection specs & downloads width: 6 HP depth: 40 mm power: 43 mA @ +12V / 35 mA @ -12V documentation videos description / manual Cuerly features three stereo channels, each with independent level control. You can connect a stereo signal to any of the three inputs: IN1, IN2, or IN3. The level of each channel is adjusted using the corresponding VOL1, VOL2, and VOL3 knobs. Mono signals can also be processed by patching a cable into the left input, which will automatically normalize the signal to the right channel. The final mix is sent to stereo headphones via the TRS PHONES output. You can control the headphone volume using the VOL HP potentiometer. To preview a signal, simply press the corresponding cue button. The cued signal is removed from the main mix and routed exclusively to the headphone output. The VOL1, VOL2, and VOL3 knobs continue to function as level controls, even when the signal is cued through the headphones. The LEDs serve as level indicators for the cued signal only. For direct comparison, turn the MIX TO HP knob to the right. This routes the main mix to the headphones along with the cued signal, allowing you to compose and patch new sounds while still monitoring the main output - without needing to remove your headphones. You can cue any combination of the three channels. If all three cue buttons are active, no audio will be sent to the main output, and the signal will be routed only to the headphones. Additionally, the cue buttons can function as mute controls for the main mix. Cuerly offers a maximum gain of +20dB, with independent gain adjustment for each of the six inputs. Gain levels can be fine-tuned using the trimmer potentiometers located on the back of the module. Cuerly is designed specifically for live performances, where sounds are improvised and created on the fly. Its compact size makes it the ideal addition to your small performance case. CUERLY QUICK START GUIDE: CUERLY_QUICK_START_GUIDE .pdf Download PDF • 1.82MB prev Up next

Modulation & Random wave / cv generator with four connected triangle lfos / 4 HP ⇣ This LFO, harnessing four interconnected LFOs, offers a powerful tool for dynamically altering CV destinations in rhythmic patterns. Its synchronized modulation brings intricate rhythmic control to your creative endeavors. 1/3 key features 4x LFO Out 4x LFO Rate Rate Switch Skiff friendly Wrong polarity protection Illuminated Wave -Logo specs & downloads width: 4 HP depth: 28 mm power: 34 mA @ +12V / 25 mA @ -12V documentation videos description / manual The rate of each LFO may be adjusted with the dedicated potentiometers. Each LFO signal is supplied on the four outputs on the bottom side of the module. Depending on the potentiometer settings also slopes or square- wave s can be generated. Please refer to the demo video below. The fours LFOs are connected to each other creating an LFO-chain. If the first LFO reaches its highest value, the second LFO starts to rise. And when the first output reaches its lowest voltage, the second channel starts to decrease and so on. Each potentiometer controls the time it takes for the LFO to reach its maximum voltage, which also controls the time it takes to reach 0 volts for its inverted counterpart (1&3 and 2&4). Simultaneously the pots control the time the other two LFOs hold their maximum voltage level. Patching all LFOs into a VCO´s sound shaping functions you can create wave -like sounding effects that will repeat periodically. This module is very good for generating very slow cycles when the RATE switch is set to SLOW. Conversely, it can also generate fast cycles when the switch is set to FAST. The state of each LFO is being indicated by the illuminated letters W A V E on top of the module. Each letter will light up when its dedicated LFO outputs a voltage. prev Up next

Effects delay / clean pt2399 delay / 2 HP ⇣ Delay is a very simple 2HP analogue vintage delay . It is based on the PT2399 chip, but doesn't have the glitchy artifacts on long delay times 1/3 key features Warm and vintage sounding delay 3 potentiometer Very easy to use, sweet spots on every turn specs & downloads width: 2 HP depth: 60 mm power: 29 mA @ +12V / 4 mA @ -12V documentation videos description / manual The feedback effect is intentionally mild, making this delay exceptionally user-friendly. No worries about overwhelming feedback loops or distorted low-quality sounds when extending the delay time. With a LEVEL knob for output adjustment and no dry/wet mix control, the module keeps it simple. Set the delay time using the TIME knob. The FEEDBACK knob lets you introduce delay and raise the repetition frequency of the delay. prev Up next

MIDI THRU serves as an operational MIDI multiplier, enabling a 1 to 5 connection, utilizing 3.5mm TRS jacks. In contemporary times, numerous devices incorporate TRS jacks for their MIDI connectivity. To establish connections with standard MIDI cables, you would require 3.5mm stereo audio jack plugs to MIDI DIN 5-pin adapters. Additionally, the majority of MIDI tools are exclusively designed with traditional MIDI DIN jacks. This is where the functionality of MIDI THRU becomes evident. midi thru / active 1x5 trs midi thru / 0 HP ⇣ MIDI THRU serves as an operational MIDI multiplier, enabling a 1 to 5 connection, utilizing 3.5mm TRS jacks. In contemporary times, numerous devices incorporate TRS jacks for their MIDI connectivity. To establish connections with standard MIDI cables, you would require 3.5mm stereo audio jack plugs to MIDI DIN 5-pin adapters. Additionally, the majority of MIDI tools are exclusively designed with traditional MIDI DIN jacks. This is where the functionality of MIDI THRU becomes evident, allowing direct connections between your TRS MIDI devices without necessitating adapter cables. key features USB MIDI THRU 1 Input, 5 Outputs A or B-Type TRS Input LED Indication Plug & Play USB Powered Optional TRS-Switch for the Outputs 0HP Desktop-Tool documents Optional TRS-Switch (Type A ↔ Type B): description / manual There is one MIDI input which is switchable from TRS MIDI Type A (this is the new standard used by KORG, Make Noise, AKAI and IK Multimedia) to TRS MIDI type B (this is the old alternative standard used by Arturia, Novation or 1010Music) by means of a push button. The input signal is actively multiplied to 5 TRS-Type A outputs. An LED indicates if a MIDI signal is being processed. MIDI THRU is powered via USB-C. Since it is an active device, it can only be used in one direction. Therefore, the outputs cannot be used as inputs. If you need a simple TRS-A to TRS-B adapter, please check out the workmate trs switch . Up

Modulation & Random influencer / multiple random cv generator / 14 HP ⇣ INFLUENCER offers a versatile collection of CV tools and creative unpredictability, divided into five distinctive sections, each serving a distinct purpose. With an array of modulation sources and an added touch of uncertainty, INFLUENCER stands as your comprehensive CV powerhouse. 1/3 key features 5x CV Generators Internal Clock & LFO CV Fall Envelope Sample & Hold/Track A/B Comparator Smooth Random CV Noise Out Input Normalisations specs & downloads width: 14 HP depth: 28 mm power: 110 mA @ +12V / 65 mA @ -12V documentation videos description / manual The TOP SECTION is the VC INTERNAL CLOCK and TRIANGLE LFO. The rate of the clock and LFO can be controlled by the RATE knob or CV. The clock signal is normalised to the trigger input of the FALL section. The TRIANGLE wave at the WAVE socket is also routed to the WAVE/RNDM SWITCH of the FALL section. When the switch is in the upper position and the attenuator is turned to the left, the wave will affect the FALL length. In the lower position, the FALL CV is slowly randomised. The SECOND SECTION is a FALL ENVELOPE GENERATOR. It can be triggered internally or externally and its fall time can be controlled by the FALL TIME knob or by CV. An inverted version of the fall output is also available. The THIRD SECTION is the SAMPLE & HOLD section. In one mode, it can sample and store a voltage from the FALL CV socket and output it at the SP OUT socket when the gate at GATE is high (Sample & Hold). In another mode, it can pass through the incoming voltage when GATE is high. It then samples and stores the last voltage applied when GATE is low (Sample & Track). The modes are selected by the MODE switch. The STEPPED potentiometer controls the level of the incoming CV signal. Internally the CLOCK is normalised to the GATE input. The CV input can be fed by an external signal, an internal SMOOTH RANDOM CV or by internal NOISE. Please note that this section may produce noise bursts in Sample & Track mode. The FOURTH SECTION is an AND / OR COMPARATOR that compares two mixable inputs and outputs the MAXIMUM CV and MINIMUM CV of both. It also generates a GATE at B-GATE if IN B is greater than IN A. Note that MIN LED barley flashes with low CV levels.The LAST SECTION is a DUAL SMOOTH RANDOM CV GENERATOR. It provides a constantly changing CV at SMOOTH I and SMOOTH II, slowly meandering in about 60 second cycles. The SMOOTH CV input will affect the SMOOTH outputs in unpredictable ways, sometimes not at all. Internally there is another SMOOTH RANDOM GENERATOR which is normalised to the RNDM switch position of the FALL section, the CLOCK CV and the SOURCE switch of the SAMPLE & HOLD section. Like the others, this SMOOTH GENERATOR may or may not be influenced by the INFLUENCE input. NOISE OUT allows access to the internal NOISE GENERATOR. You could also use the module as an OSCILLATOR. INFLUENCER QUICK START GUIDE: INFLUENCER_QUICK_START .pdf Download PDF • 1.34MB prev Up next

Meet the Swiss Army knife's ambitious cousin – the multitasking marvel that sits in front of your Eurorack, ready to unscrew musical conundrums, slice through soundscapes, and twea-zor its way into your sonic heart. workbench / usb powered multi utility tool / 0 HP ⇣ Meet the Swiss Army knife's ambitious cousin – the multitasking marvel that sits in front of your Eurorack, ready to unscrew musical conundrums, slice through soundscapes, and twea-zor its way into your sonic heart. key features Multiple LFO Attenuator documents Fader Swap USB-Power description / manual Multiple 1 to 3 multiple with one inverted output. The multiple is normalised to the swap unit of the module. LFO The LFO provides a triangle and square wave and can be reset by an external gate or clock signal. The LFO signal can be attenuated with the slider pot and its rate may be varied with the RATE potentiometer. An inverted copy of the triangle wave is normalised to channel A1. An inverted copy of the square wave is normalised to channel B1. These connections are independent from the LFO attenuator and may be interrupted by patching a cable into the channel A1 or B1 input or by the normalisation selection switches. You can choose to normalise the LFO or a fixed voltage of 0V to +5V adjustable with the VOLTAGE knob for all channels at once. Attenuator/Mixer WORKBENCH has four channels A1, A2 and B1 and B2. Any signal (audio or CV) patched into the inputs are attenuated by the slider pots. The channels of each section are daisy-chained, thus they can be mixed or the second channel can act as an offset (CV). The normalisation switch selects which voltage will be fed into the input if no cable is being patched (LFO or fixed voltage 0V to +5V). Fader The Fader mixes between two sources with a single slider. Both channel sections A and B are mixed into a fader circuit, if no cable is inserted into their outputs and the fader inputs. The fader output can be attenuated with the LVL knob. Swap The Swap unit exchanges the destination of one or two sources with the push of a button. This way you can route two signals to the corresponding destination of the other input. Anything patched into the Mult will also be multiplied to the Swap inputs of nothing is patched here. USB Power WORKBENCH is powered by standard USB power (+5V) and is fully compatible with your Eurorack system. You can choose to power it with a Mini B, Micro B or Type C USB cable. You can solder all USB connect or just one of them, if you have a favourite USB cable you want to use. Up