Search this site

DII·ONE is a compact MIDI controller and routing hub designed for modern hybrid music setups.   It combines USB MIDI, hardware MIDI, and a CV clock output in a single device, allowing all functions to operate simultaneously without compromises. rattlecore / piezo pre-amp PCB with high-pass filter / PCB only ⇣ Rattlecore is a compact, high-gain piezo preamp PCB with integrated high-pass filter designed for DIY noise boxes, contact mics and experimental sound sources. key features High-quality OPA1656-based preamp Adjustable gain from +10 dB up to +50 dB Integrated high-pass filter (47 Hz – 4.8 kHz) Optimized for piezo contact microphones Clean virtual ground via TLE2426 rail splitter Onboard power LED Protection diodes on input Compact PCB for easy enclosure builds Designed for 9V DC operation (battery or DC) Soft grounding option for enclosure → documents RATTLECORE_QUICK_START_GUIDE.pdf description / manual Rattlecore is a dedicated piezo microphone preamp and filter circuit designed for experimental sound design, noise instruments and DIY contact mic boxes. The circuit is built around a low-noise, high-performance op-amp stage and provides enough gain to bring even very weak piezo signals into a usable audio range. The gain can be adjusted via an onboard potentiometer, allowing anything from subtle amplification to aggressive boosting for noisy textures. A second stage implements an adjustable high-pass filter . This helps to remove low-frequency rumble. It also allows you to shape the tonal character of your sound source, from deep thumps to sharp clicks and textures. The PCB uses a virtual ground (rail splitter) to run cleanly from a single 9V supply . This keeps the design simple and makes it ideal for standalone DIY builds. This is not a complete instrument. The PCB design is provided as a DIY project component. You will need to: add your own piezo sensors build or design an enclosure add jacks, controls and mechanical parts install power supply socket or battery The design is intended for DIY builders who want to create their own custom noise boxes or experimental instruments. RattleCore works especially well with piezo contact microphones that capture vibrations from: metal objects springs surfaces resonant bodies Every build can sound completely different depending on what you attach to it. DIY Build Example Wooden enclsoure made by barebaric.com Up

SUPPORTING FILES This page provides you with all the essential documents for your DIY project. Feel free to download the necessary files at your convenience.

Effects reverb / short reverb / 4 HP ⇣ Reverb is a very simple 4HP Reverb module based on the Accutronics Digi-Log- Reverb BTDR-2H. 1/3 key features 2 to 2.85 Seconds Reverb Time depending on the BTDR Type Tone Control “OSC” Switch for Feedback Loops “Depth” Reverb Size Control Wrong Polarity Protection specs & downloads width: 4 HP depth: 55 mm power: 65 mA @ +12V / 0 mA @ -12V documentation videos description / manual The unit features typical Reverb Amount and Feedback controls, along with an extra Tone knob to adjust the input audio's frequency for the reverb. Furthermore, an OSC toggle activates a reverb signal feedback loop, while the Depth setting can be likened to a "cathedral" switch, expanding the reverb's expanse. This straightforward design produces concise reverberations along with abundant noise and captivating feedback chaos. prev Up next

Oscillator chiasso v2 / analog fm drum synth / 14 HP ⇣ CHIASSO V2 stands as an exceptional oscillator, perfect for generating dynamic Techno sounds that consistently captivate through each knob adjustment. In its V2 iteration, it retains the same exceptional sound foundation found in V1. However, V2 introduces innovative enhancements like CV decay inputs and an added noise source for oscillator A, promising even more sonic possibilities. 1/3 key features Two Analog VCOs Two LFOs SQUARE and TRIANGLE Waveforms for OSC and LFO Cross Modulation CV Decay Fade Potentiometer to adjust the Oscillator Mix Trigger and Pitch Normalization Wrong Polarity Protection specs & downloads width: 14 HP depth: 28 mm power: 55 mA @ +12V / 35 mA @ -12V documentation videos description / manual The module has two oscillators that can generate square or triangular waveforms that you can seamlessly crossfade with the WAVE potentiometers. Each oscillator has its own CV decay envelope, a pitch potentiometer and can be triggered with a trigger signal patched to the left TRIG input as well as individually via the left and right TRIG inputs. A fade potentiometer offers the possibility to manually fade between both oscillators to adjust the mix. Noise can be added to the left oscillator A to make it a little dirtier. There are PITCH CV inputs with attenuators for each voice which, although they don´t track exactly 1 V/OCT, are very useful for changing the mood of each signal to create very organic and moving sounds. The audio output of each side is normalised to the PITCH CV input of the opposite side. The left side is connected after the VCA and the right side before the VCA to achieve different types of cross-modulations and to apply modulation according to incoming trigger signals. In addition, the module has two individual LFOs with square or triangular waveforms that can be fed to the oscillators for further frequency modulation synthesis. Both LFOs have an attenuator to adjust the strength of the modulation and a RATE potentiometer to change the speed of the LFO cycle. The signals of the two oscillators are mixed and output at the OUT socket. prev Up next

Utilities & PSU mult / dual buffered multiple / 3 HP ⇣ Ever wish life had a "Buffered Multiple" module? One for when you need to duplicate yourself at the family reunion, and another for when you're avoiding the office coffee duty! Just plug into these magic modules, and voilà – instant you, in multiple places. Unfortunately, our modules are for signals, not people, but hey, we can all dream of a buffered clone army, right? 1/3 key features Buffered Mult iple 1x4 and 1x2 or 1x6 via Normalization 1x Inverted Buffered Output Easy to Build Wrong polarity protection specs & downloads width: 3 HP depth: 28 mm power: 12 mA @ +12V / 8 mA @ -12V documentation videos description / manual MULT is a dual 1x4 and 1x2 or a single 1x6 buffered mult iple. The first input is distributed to 4 buffered outputs. The last output is inverted.The second input is distributed to 2 buffered outputs.The first input is normalized to the second. This way you can also use MULT as a 1x6 buffered mult iple. Each input has an LED indication. 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

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. 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

Modulation & Random cion / cv function generator / 6 HP ⇣ CION embodies versatility, functioning as a CV AD or ASD envelope, basic filter, slew limiter, and even a voltage-controlled oscillator with variable waveshapes. 1/3 key features Attack & Decay Envelope Attack & Decay CV (also both simultaneously) Shape Control CV Processing via Input Socket Trigger Input Cycle Functionality with CV Control EOC Output LEDs indicate Activity on all Outputs Wrong Polarity Protection Skiff friendly specs & downloads width: 6 HP depth: 28 mm power: 45 mA @ +12V / 31 mA @ -12V documentation videos description / manual The function generator offers an ATTACK and a DECAY potentiometer, which represent the attack and decay times, the positive or negative slew time or the rising and falling edges of an oscillation, depending on the application. There is a CV input for ATTACK and DECAY. The rise and fall times are individually voltage controllable, but they can also be controlled together via the AD input. A shape knob lets you change the CV curve from exponential to logarithmic. The time range per cycle can be as fast as 3ms and last for up to 20 minutes depending on the position of the RANGE switch. The TRIG socket is used to start the envelope via CV. This can also be done by the press of a push-button. Connect any signal (CV or audio). to be processed to the INPUT jack. Insert a gate signal to add a sustain stage to the AD envelope. If no external signal is available to trigger the envelope, the function generator can be set to loop mode by the CYCLE switch. When the switch is active, the envelope starts again from the beginning as soon as it reaches the end of a cycle. The CYCLE CV input activates or deactivates the cycle functionality depending on the switch position. An End-Of-Cycle signal is available at the EOC socket. CION QUICK START GUIDE: CION_QUICK_START .pdf Download PDF • 574KB prev Up next

Effects 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

Mixer & VCA phoebe / 4-channel afl mixer with aux send / 18 HP ⇣ PHOEBE stands out as a highly interactive 4-channel mixer that seamlessly integrates into any Eurorack configuration, offering a tactile experience that complements diverse setups. 1/3 key features 4 Channel Mixer 4 x Mute / Level / Aux Send 2 x Send/Return (per Channel and Selected) AFL (After Fade Listen) via Headphone Out Smooth Transitions with Slider Pots Performance-Orientated Mixing Wrong Polarity Protection specs & downloads width: 18 HP depth: 30 mm power: 70 mA @ +12V / 50 mA @ -12V documentation videos description / manual PHOEBE has four channels. Each channel has a MUTE switch, a LEVEL control and a SEND knob in order to use external effects. Underneath these controls there is the MIX/AFL Fader which determines if the signal should be routed to the MIX or the HEADPHONE output jack. In the top „MIX“ position the channel´s audio is routed to the MIX out. In the bottom „AFL“ position it is routed to the HEADPHONE out. AFL stands for „After Fade Listen“ and enables you to listen to the channels audio before you add it to the MIX output. It is similar to PFL (Pre-Fade Listen), but the signal is taken after the LEVEL settings in order to have a good mix comparison on the headphones. Imagine you are playing a live set and want to take a sound from the mix in order to add a new one from the same VCO later on. Simply pull the fader slowly from MIX to AFL in order to take it smoothly from the MIX out. Then change the sound, edit sequences etc. and listen to the result on the headphones first. Add the mix output signal to the headphones with the little MIX trimmer potentiometer and verify if the new sounds fits the mix. Then just push the fader up into the MIX position and the transition is complete. The upper position of the slider always equals volume that is set with the LEVEL knob. So it´s save to bang it up for breaks and cuts during your performance. You may adjust the headphone volume with the VOLUME trimmer potentiometer. In addition to the SEND and RETURN effect routing per channel there is also a second SEND S and RETURN S routing which lets you send the signal of several selected channels (via jumper on the back) with one knob at once. Both SEND/RETURN ways are active also when the channel is in AFL mode and not being supplied to the mix. This way you can add the effect return of a channel to the mix even if the original sound is currently not playing. All channels have dedicated GAIN trimmer potentiometers on the front. prev Up next

Filter & EQ hans / compact stereo diode-ladder filter and lfo / 6 HP ⇣ HANS is a compact 4-pole low-pass stereo diode-ladder filter with an internal LFO. Inspired by the famous diode ladder filters found in EMS and Roland TB-303 devices, this filter delivers a distinct and unique sonic character. The module also features an internal LFO for dynamic movement of the cutoff frequency. 1/2 key features Diode-Ladder Filter 4-Pole Low-Pass Design Stereo Inputs and Outputs Cutoff CV Control with Attenuator Internal Triangle LFO with Level Control LFO Output Only 6 HP wide Skiff friendly Wrong polarity protection specs & downloads width: 6 HP depth: 30 mm power: 35 mA @ +12V / 29 mA @ -12V documentation videos description / manual Designed for stereo signals, HANS comes equipped with stereo inputs (IN L and R) and stereo outputs (OUT L and R). However, if you want to use a mono signal, connect it to the IN L socket, which is internally normalised to the IN R input. Manual control of the filter cutoff frequency is achieved with the FREQ potentiometer. Additionally, the cutoff can be modulated using the internal LFO and/or external control voltage (CV). Adjust the LEVEL knob to introduce a triangle LFO to the cutoff frequency, cycling from +0V to a maximum of +10V. The RATE knob, indicated by an LED indicator, allows you to set the LFO's speed. It is designed for long cycles and enables very slow movements lasting more than 10 minutes, but does not achieve audio rates. To disengage LFO control, simply reduce the LEVEL knob. Simultaneously, external CV can be patched to the CV input, with the CV attenuator enabling external control of the filter's cutoff frequency. An LED indicates the current voltage level of the external CV. Improve the characteristics of the filter by using the RES potentiometer to apply positive feedback that emphasises higher frequencies. The signal may be distorted at very high resonance settings. Self-resonance is possible, but only at very high frequencies. For further external processing, the internal LFO's triangle waveform is accessible at the LFO output. This feature adds flexibility to your modular setup, enabling creative possibilities beyond the module's primary functions. HANS QUICK START GUIDE: HANS_QUICK_START .pdf Download PDF • 485KB prev Up next

Utilities & PSU pedal pal / efx pedal audio bridge & expression pedal module / 4 HP ⇣ Pedal Pal is your way to use guitar effect pedal s with the Eurorack Modular System. 1/3 key features Mono Send with Attenuation Stereo Return with Gain for each Channel Output Gain of max. +20 dB Expression Pedal Control (CV or Manually) Voltage limited to 3V or 5V adjustbale via Jumper Wrong polarity protection specs & downloads width: 4 HP depth: 28 mm power: 25 mA @ +12V / 21 mA @ -12V documentation videos description / manual PEDAL PAL features a mono send with pedal attenuation and a stereo return with individual channel gain adjustment from the pedal. You can fine-tune attenuation and gain through trimmers located on the module's back. Furthermore, it doubles as a CV expression pedal using a TRS cable. You have the option to manually manipulate your effect pedal's parameters by plugging into its Expression In jack, akin to using an expression foot pedal. Alternatively, you can employ any CV source (like an LFO or Envelope) to automate effect adjustments. When external CV is applied, the potentiometer functions as an attenuator. The CV delivered to the pedal's expression in jack can be constrained to either 3V or 5V, adjustable via a jumper on the rear. It's important to note that CV control over effect parameters will only function if your pedal includes an expression pedal TRS input. To establish connectivity between the module and your stereo effect pedal, three 6.3/3.5 mm adapter cables and a 6.3 mm TRS cable will be required. prev Up next