st case small / 3d-printable eurorack case / 20 HP ⇣ ST CASE SMALL is a 20HP 3D printable Eurorack case designed to hold a small power supply (e.g. POW!) and an effects module to build a modular-compatible effects unit the size of a guitar pedal. Of course, you can also mount any other type of module that suits your needs. The internal depth of the cabinet is 35mm, the rails are inserted from the side. It is recommended to glue small rubber feet underneath to ensure a good stand. There is a large hole at the bottom for easy access to the power cables and calibration trimmers or bridges. This makes this enclosure ideal for testing purposes. To have your ST CASE SMALL 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 15€ to 30€ (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 3€. The case shown on this page was printed with PLA on a Bambu Lab X1C. key features 3D-Printable Low-Cost Slide-in Rail Brackets Lightweight specs & downloads width: 20 HP depth: 55 mm power: no psu DOWNLOAD STL (ZIP) Up

singer / feature-rich delay with extensive parameters / 8 HP ⇣ Probably SINGER is one of the best equipped DIY PT2399 Delays available. It is the consequence of years of development of other delay effects such as DELAY V2 and GRITZNER and now combines new and old functions in one module. Why another PT2399 Delay? Well, because the PT2399 is a very special kind of delay with its own and very unique character we all love and we want CV control over most parameters. In contrast to DELAY V2 and GRITZNER, SINGER was made to explore the boundaries of the PT2399 chip and is able to create all sorts of crazy delay, glitch and noise sounds. It is rather specialized on short delay times, but can create some really nice delay and feedback craziness. 1/4 key features Analog Delay CV Control over most Parameters Two Inputs Internal LFO WET Output Wrong polarity protection specs & downloads width: 8 HP depth: 45 mm power: 95 mA @ +12V / 45 mA @ -12V documentation videos description / manual SINGER has two audio inputs IN A and IN B, whereas IN B includes a high pass filter that attenuates frequencies below 320Hz. Especially for effect sends it is helpful to only introduce a high pass filtered delay effect to the mix. You can switch between IN A and IN B by using the A/B switch (switch MAN / LFO set to MAN) or by introducing a CV gate signal to the A/B GATE input jack. When the CV gate signal is high, only IN B will be routed to the delay circuitry indicated by the IN B LED. It is also possible to switch between both inputs using the internal LFO (switch MAN / LFO set to LFO). This way you can create some really unique delay cascades using two different audio signals. The DELAY TIME can be changed with the large DLY TME knob. The range is set to be too large for the PT2399 chip to handle. Consequently turning the knob from 2 o´clock on clockwise will create crazy glitches and noise artifacts. Cleaner delay times can be achieved by settings from 7 to 12 o´clock. The delay time can be changed via CV at the TIME CV input jack. A dedicated DLY CV attenuator let´s you decrease the amount of CV that is being applied. Additionally an internal LFO can control delay time if nothing is patched into the TIME CV jack and the DLY CV knob is turned to the right. The LFO rate can be set with the LFO RATE potentiometer and the LFO cycle can be reset by a CV gate or trigger signal that is patched to the LFO RESET input jack. You may choose to use a triangle or square wave LFO with the help of the TRI/SQU switch. The LFO is normalized to delay rate and feedback via the dedicated attenuators if nothing is patched to the corresponding CV input jacks. The LFO rate LED only indicates LFO waves controlling delay rates after attenuation. The LFO is also normalized to the A/B input switch if the MAN / LFO switch is set to LFO. A DRY/WET potentiometer sets the amount of delay effect that is applied to the OUT jack. On top the level of the wet signal can be changed with the IN attenuator. Hence if the DRY/WET pot is fully clockwise and the IN attenuator is fully counter-clockwise, no signal is audible at the OUT jack. FEEDBACK may be changed with the help of the FEEDBACK knob and can also be controlled via CV at the FDBK CV jack and the dedicated FDBK CV attenuator. If nothing is patched to the FDBK CV jack you can also route the internal LFO to control the feedback amount if you turn the FDBK CV attenuator to the right. VCA CV provides the opportunity to control the level of amplification of the wet signal via control voltages such as an envelope or an LFO. The WET output supplies the pure delay signal at any time. SINGER QUICK START GUIDE: SINGER_QUICK_START .pdf Download PDF • 741KB prev Up next

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

kau'i / dual techno oscillator / 8 HP ⇣ KAU'I is a basic two oscillator sound generator that was designed to create Techno basses and leads. 1/3 key features Dual Analog Oscillator Manual Wave-shape Controls Independent Level Control Mix Output Noise Generator Wrong Polarity Protection specs & downloads width: 8 HP depth: 28 mm power: 55 mA @ +12V / 29 mA @ -12V documentation videos description / manual Oscillators A and B share identical designs but cover distinct pitch ranges. Using the A and B knobs located atop the module, you can seamlessly transition the waveform of each oscillator from a square-wave to a triangle wave. The SHAPE2 knobs then take this waveform and blend it with an independent sine-wave signal for each oscillator. The LVL knobs adjust the volume of each sound generator, while rotating the NOISE knob introduces white noise to oscillator A on the MIX output. Both oscillators feature a pitch control input accompanied by an attenuator. This input follows a linear voltage-to-frequency response (Hz/Oct), making it ideal for generating unique Techno sequences at lower frequencies. At the module's base, you'll discover a MIX OUT combining the outputs of both oscillators, alongside individual outputs for each oscillator. prev Up next

stm / 3-channel stereo mixer / 4 HP ⇣ STM proves to be an incredibly convenient and user-friendly 3-channel stereo mixer featuring three intuitive volume potentiometers. Its straightforward design allows for easy manipulation, while onboard trimmers enable seamless gain adjustments per channel. This versatile mixer caters to both line and Eurorack levels, all encapsulated within a compact form factor for added space efficiency. 1/3 key features Analog Mixer 3 Stereo Channels +20 dB Gain per Channel LED Indication Skiff friendly Wrong polarity protection specs & downloads width: 4 HP depth: 30 mm power: 24 mA @ +12V / 15 mA @ -12V documentation videos description / manual STM is a simple but very useful 3-channel stereo 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. Each of the left inputs is normalized to the corresponding right channel, provided nothing is patched there. prev Up next

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ST Modular has garnered acclaim for its DIY Eurorack Modules, which empower users to assemble personalized modular synthesizers using supplied PCBs and components they acquire themselves. The array of modules available spans oscillators, filters, sequencers, mixers, LFOs, envelope generators, effects., but also desktop synthesizers and tools, each meticulously designed by ST Modular to offer exceptional versatility. These modules cater to an extensive range of sound manipulation and modulation possibilities. The origin of these modules traces back to a personal hobby managed by an individual enthusiast. The expertise in electronics and circuit board construction essential for bringing these projects to life was acquired through a blend of book learning, hands-on breadboarding, and engaging conversations with fellow synthesizer enthusiasts. Until today, ST Modular is operated as a non-profit small business, utilizing all revenues to cover costs for prototyping new modules and synthesizers. ST Modular doesn't directly sell its designs, but instead provides licenses to third parties for manufacturing and distribution. Alongside the sale of PCBs, panels, and DIY kits, certain partners of ST Modular also provide fully assembled modules. Stefan Tretau The S and T before Modular Hey! I am Stefan — a multi-faceted individual acknowledged for my roles as a devoted father, a loving husband, and a passionate musician. My journey in the world of music commenced during the early 2000s, where I found myself captivated by the realm of electronic music. Armed with a selection of electronic instruments, including a TB303, MC307, Micro Modular, and Xbase09, I embarked on a creative exploration that would come to define my artistic identity. In due course, my musical endeavors expanded beyond personal exploration. Live performances became an integral part of my artistic expression, and I successfully transitioned to releasing music on esteemed labels such as Heimatmelodie, Karmarouge, Fortek, Broque, and Night Drive, etching my presence into the electronic music landscape. Sometime around 2010, I took the step of founding my own label, ST RECORDS . The journey began with the vinyl release "Whatever Happened," and to this day, it remains the platform through which I share my music with the world. Yet, my interests transcended performance and production, leading me down the path of curiosity. In 2015, a pivotal juncture in my journey arrived when I grasped the intricate mechanics behind sound generation, particularly concerning Schmitt Triggers and Operational Amplifiers. This understanding marked the genesis of a fresh chapter, propelling me into a phase of self-guided learning encompassing circuit board design, soldering techniques , and culminating in the construction of my first DIY effect pedals. The allure of the "do-it-yourself" ethos grew stronger, prompting me to deepen my knowledge, craft my own schematics, and experiment with prototypes on breadboards. As my passion for modular synthesizers burgeoned, I embarked on a new venture in 2017 — designing my own Eurorack modules, such as "Switched", "Triple Tom", "Cyllene" and "Franz". The positive reception and subsequent demand from the DIY community inspired me to take the next step. Recognizing the enthusiasm for recreating these modules, I made front panels and circuit boards accessible through pushermanproductions.com. This marked the genesis of ST MODULAR , an endeavor driven not by commercial aspirations but by a desire to innovate within the modular synthesis landscape. Unlike the usual practices in the industry, ST Modular is more about pursuing a personal artistic vision for me than fulfilling the wishes and ideas of others. I prioritize uncharted functionalities and distinctive designs, unfettered by market trends. This approach enables me to cater to my own artistic instincts while fostering a sense of community engagement among fellow enthusiasts. ST Modular remains a project driven solely by passion, devoid of profit-oriented objectives . Witnessing individuals create music using modules I've conceived brings me immense satisfaction, encapsulating the essence of artistic camaraderie. The crux of my journey lies in the harmony of music, where notes and circuits converge to create a symphony that resonates beyond temporal confines. Thank you for visiting these pages, Stefa n Up

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workmates / passive eurorack tools / 0 HP ⇣ WORKMATES is a series of little passive 0HP modules that offer simple but effective audio and CV processing in conjunction with your modular or semi-modular synth. Note that these are passive modules without any power consumption. As a result, you will have a bit of signal level reduction when patching a WORKMATE within your modular processing chain. Nevertheless these little helpers are very convenient solution providers if you run out of HP. They are also the easiest way to learn SMD soldering. Practice your soldering skills without any fear of shorts and magic smoke. pix PIX is a passive mixer with 3 stereo inputs and 1 stereo output. Each channel has its own volume control and tilt EQ. With the EQ you can emphasize either low or high frequencies. Due to its passive design, a very compact format could be realized, with dimensions of only 55mm x 65mm. It was designed for use with modular level inputs, which are further processed by line-level devices with volume amplification. You can also use this mixer with line-level synthesizers, but you will lose quite a bit of volume. If too much gain is then used in the downstream processing chain, the noise floor can be raised to an uncomfortable level. Nevertheless, PIX has been used successfully with line-level signals. PIX is your solution for compact mixing requirements in a mobile modular setup. split Splits MIC MONO INPUT and STEREO OUTPUT signals to individual jacks from TRRS Combo Jack. The microphone input has a level potentiometer. Ideal for easy sampling and mixing with devices like OP-Z or tablets. touch TOUCH is a passive, touch-sensitive attenuator. Any signal applied to the input jack passes through your skin to the output jack. Depending on the amount of pressure and the moisture of your finger, the resistance decreases, allowing a larger portion of the signal to pass through. trs switch TRS MIDI type A to/from TRS MIDI type B adapter. Swaps the tip and ring of a 3.5mm stereo jack. Ideal for connecting TRS MIDI devices with different TRS MIDI standards (e.g. Novation device with KORG device). lpg LPG is a passive vactrol based low pass gate. It also has a passive low pass filter for subtle tone control. By choosing different kind of vactrols you will achieve contrasting kind of gate responses, from lush and slow to very fast and snappy. clipping cat CLIPPING CAT is a passive distortion that can blend between hard clipping crossover distortion and softened LED clipping that is only applied to negative peaks of the signal. Hence you can control the type of distortion from harsh clipping to a rather subtle distortion with more even order harmonics. “Clipping Cat” will wink if you turn the potentiometer counter-clockwise for softened distortion and will stare at you with both eyes turning it clockwise for harsh clipping. Clipping Cat is also availbable as an active 3U module! swap SWAP exchanges the destination of one or two sources (audio or CV) with the push of a button. This way you can route two different signals to the corresponding destination of the other input or route one signal to either one of two patch cables. You may also use it as a simple on/off switch. There might be audible clicks when using it to swap/switch audio. combiner COMBINER is either a 4 to 1 Passive Mixer, an or-wired Trigger/Gate Combiner or a 1 to 4 Passive Mult. Before soldering you have to decide which functionality you prefer. If you solder resistors you will get a four-channel mixer and if you solder diodes you will have a trigger/gate combiner. For a Passive Mult you just need to short the pads mentioned in the BOM. eq EQ is a one knob low and high frequency EQ with mid frequency range control. Turning the knob counter-clockwise will filter out frequencies above 1kHz and turning it clockwise will filter out frequencies below 1kHz. Not filtered frequencies are emphasized a bit to have a sharper sound when lower frequencies are filtered and to have more bass when higher frequencies are filtered. The little mid frequency range knob moves the cutoff range around 1kHz and changes how much the not filtered frequencies are emphasized. attenuator ATT is a simple attenuator that allows level control over CV or audio signals. If you want to use it for audio and you don´t have a logarithmic pot at hand, you have the option to use a linear potentiometer and solder an additional resistor for a fake logarithmic response. videos Up

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

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