"The Frequency Shifter (red) is a powerful and experimental analogue processor. This standalone design springs from my Quadrature Sine and its Frequency Shifter Expander modular designs – all wrapped up with circuitry & features to allow it to fit snugly into more regular studio processing roles.It will transform your audio streams in otherworldly ways – clangorous, tonal, phased, stereofication and swoosh.
"everything is from the synth to the zoom recorder, twin t drums, xor snare, pt2399, and cmos stuff.
attiny85 reseting the phase of 40106 oscilators, the digital control accepts 1voct from keysetp and go to the 40106 inputs through resistors, a little rc for filtering the pwm, and for this reason when you change the oscillator frequency you can get intervals and crazy stuff. is not orthodox but suits my need for Rich timbres. the dco goes to 40106 buffers , and then 4040 dividers, twin t filters, one for each of the two voices, one goes to env, vca, filter, delay, and the other one to clock divider and filter, to get the sub osc.
firmware super simple only for checking the conversion from filtered frecuency of the attiny85 to my 40106 non exponencial vcos.
currently is tracking 10 octaves really good, the trick is put a voltage divider in the cv in of the attiny because keystep has 0 to 10v and the attiny accepts 0 to 5v tehn the tracking inside the attiny converts o.5v oct to 1 volt oct. i dont know anything about coding but i made it with chat gpt and my design .
source code will be in the coments ."
"Scale Snap generates random but scale-accurate note patterns of up to 16 steps. You choose the key/scale, root note, number of steps, and how “jumpy” the pattern feels. It also includes a chord/'Strainer' mode that locks notes to triad tones (random-only, ascending, or descending).
Connections include clock in, 1V/Oct CV out (0–5V), reset to step 1, and a random trigger/button. Controls let you set root, select from multiple scales (chromatic, major, minor modes, pentatonics, etc.), and adjust a parameter that switches between probability of change, octave range, and step count. The display shows step progress, current parameter values, root/scale name, and a scale grid with the active note highlighted."
"Here we have a 3 Patches series video with the character oozing CEREMONY, a low pass morphing to twin peak band pass filter packed with modern features and lots of CV options and SIGIL a compact function generator for envelopes, LFOs, slews or other function generator tricks! Check out the patches and skip around below."
"If you'd like to support work like this and the wider range of what I do, considering heading over to Patreon at https://bit.ly/DK-patreon and supporting for as little as $1 a month to gain access to the DivKid Discord community, plus lots of exclusives such as PDF patchbooks, videos and more. https://bit.ly/DK-patreon"
*TIMING INDEX // CHAPTERS*
NOTE // sub bullet points are points of interest within each section/patch, for those that might be looking for a specific detail to skip back to.
"The Fancyyyyy K-Accumulator is a revolutionary stereo complex oscillator that combines cutting-edge synthesis techniques in an intuitive, hands-on architecture inspired by classic complex oscillators. Designed in collaboration with Grrrwaaa aka Graham Wakefield, creator of Max/MSP's gen~ platform, fans of experimental timbres and novel synthesis techniques are right to celebrate K-Accumulator's emergence into the Eurorack landscape. Seamlessly combining pulsar synthesis, phase modulation, and complex 3D waveshaping, K-Accumulator pairs its modulation and carrier oscillator pairs with an onboard function generator, pattern generator, and flexible root frequency quantization and manipulation, providing fruitful terrain for exploring captivating timbres in systems of any size.
Starting from a core sine and cosine wave, K-Accumulator provides an innovative morphing matrix architecture which progressively remaps panel controls to waveshaping positions for the carrier and modulator oscillator section. Expand tones with complex harmonic wavefolding, blended frequency shifting, and harmonic stretching. Shape tones into newly mangled forms with formant synthesis, sync damping, and asymmetric phase modulation, or invite chaotic movement and surprise with damped cross phase modulation and damped self-feedback. Even the onboard function generator can sing, enabling audio rates for pulsar synthesis that can be operated independently from the main oscillator. Despite the PhD in DSP you might need to fully understand K-Accumulator's synthesis engine, the morphing matrix architecture allows these many manipulations to be smoothly and seamlessly explored through intuitive manual control.
Even further possibilities abound when employing K-Accumulators twenty-three patchable points of external signal integration, with most primary CV inputs featuring dedicated attenuverters for precision control. In addition to CV control over the frequency, shift, depth, morph, and shape controls, the primary oscillator in K-Accumulator offers CV inputs for thru-zero phase modulation, damped/pulsar control, and an external input which can be used as an external sync source or for pitch-tracking an external source to use K-Accumulator to harmonize with external sources. Its outputs offer both the sine and cosine waves, creating unique stereo space through the phase differences on each output as it is manipulated by the waveshaping engine. Control root frequency for the oscillator section, function generator, or both, with both 12-TET and Just Intonated quantization, multiple scales of frequency control, and a dedicated detune control in the modulation oscillator for inharmonic applications.
At the left side of K-Accumulator, a highly flexible function generator is onboard for additional modulation or audio sources. Multiple unique internal trigger modes, looping capability for LFO and audio rate oscillation, thru-zero FM, and onboard waveshaping make this a potent source of signal manipulation for either K-Accumulator itself or anywhere in your system. To the right of the function generator, a Delta-Sigma pattern generator enables stepped and smooth pseudo-random pattern modulation, providing an onboard sequencer for root frequency, or any other parameter. With its immensely capable and unique synthesis engine alongside flexible and creative onboard modulation sources, Fancyyyy's K-Accumulator offers a new vision of complex oscillation for contemporary modular synthesis, translating vanguard digital signal processing into a familiar form factor for deep sonic exploration, intuitive skronking, and new musical forms yet unheard."
"Over the last month, we have been recording videos for our Instagram channel. Here is a compilation of some of the clips!
In the video, the A-121-S stereo filter is mainly used as an end-of-chain filter. In combination with the A-149-4 quad random voltage source, it is possible to add modulation to the stereo field.
The feedback path was often patched in the clips, for example with a bandpass filter that had high resonance. This can lead to some pretty crazy sounds, as you can hear!
Another interesting thing to try is playing really high or low notes. Some of these the BBD is unable to track, which results in some quite nice glitches.
The A-188-9 and A-188-1 BBD combo offers a wide range of sound possibilities and often produces happy accidents. It's totally worth trying!
Questions? Let us know!
Module A-188-9 is a so-called high speed VCO that tracks prefectly to the 1V/oct scale in the frequency range of about 15kHz ... 500 kHz. The main application is the exact drive of BBD modules (A-188-1/2) to generate sounds realized by means of the so-called Karplus-Strong synthesis. But even in cooperation with other modules featuring high speed inputs (e.g. digital noise, delay, frequency divider) the A-188-9 makes sense. In principle, the module is made of a precision audio VCO followed by a PLL (phase locked loop) unit that multiplies the frequency of the audio VCO by 32. Thus the module can be used also as an audio VCO as it features the standard waveforms sawtooth, triangle and rectangle with adjustable pulse width."
"Rossum Electro-Music works its' way into the 5U system. The results are pretty nice.
Using a Trident Oscillator with quantized pitch CV from a Mob Of Emus into three envelopes from Synthetic Sound Labs Octal VCA Expander, then on to the Rossum Panharmonium Mutating Spectral Resynthesizer.
A tap off the Trident is sent to the Rossum Linnaeus filter for a percussive FM part which starts the work. The timing is from the Moon Modular 563 Trigger Sequencer.
The rhythm section is the Synthetic Sound Labs / Hagiwo Geo Gruvn euclidean sequencer for all the parts.
The bass part is the SSL Woven Spirits (MI Plaits) in wavetable mode.
The dual Q960 sequencers are transposing the 1V/Oct input to the Panharmonium and sending various control voltages to the bass and another pad swell sounds from the 5U system.
All recordings are in real time to Cubase 12 and video is edited in Final Cut Pro."
1. Bastl Citadel Breakbeat Party - Stazma and Bastl Instruments
2. BASTL CITADEL! FX Wizard and Wave Bard Sampler comes to Eurorack! - The Unperson and Bastl Instruments
3. Bastl Citadel: A TWO-FACED friend with Samples + FX - Turbo Tambourine and Bastl Instruments
Check with dealers on the right for availability and price.
"Bastl CITADEL - Fortress of Modular Magic - is a Eurorack reimagination of the popular Kastle 2 semi-modular desktop device. The CITADEL comes with a full 3.5mm patch bay that offers the flexibility needed in the Eurorack format while maintaining the strengths of the Kastle 2 allowing it to stand on its own, and yet let it truly shine when patched with other modules. We’ve also added switches for hands-on control of the pattern generator. The Citadel provides the basic infrastructure needed to integrate Eurorack systems within the context of electronic music making: headphone output, TRS MIDI input and sync, tempo generator with divider/multiplier, USB MIDI (from the back of the module), stereo mixing, integrated LFO and Pattern generator and effects. All that makes it the perfect module for smaller and beginner systems while the fun and unique creativity of the Kastle 2 firmwares: the FX WIZARD multi-effect processor and WAVE BARD sample player will earn its place in larger setups.
๐ ️ Get Wave Bard & FX Wizard at the same time ๐ The Citadel comes equipped with a reversible front panel with WAVE BARD on one side and FX WIZARD on the other side. It also comes with our custom designed tool to make the panel switching as seamless as possible. You can load and try different Citadel/Kastle 2 present and future firmwares and updates with a USB port (on the back).
The Citadel might break a few rules of standard Eurorack design, but it does so in the name of instant musicality, fun, and effortless integration of Eurorack with other gear. The PITCH inputs on the WAVE BARD track 1V/Oct, are factory-calibrated, and there’s even dedicated calibration software to ensure a perfect match with your source."
"Erica Synths - Fusion System in excellent condition
She’s a real screamer! Available for purchase on our used reverb page. Interested in trading in your gear for store credit? Shoot us an email! #synth #eurorack #modularsynth"
"Fusion System MK1 in excellent condition. This system has been fully tested. all modules function as expected and the modules all sound incredible!
Comes in an Erica Synths powered skiff with original PSU.
Erica Synths Fusion Drone System is here for those, who want to explore the dark territories of the sound, where only few have stepped in.
Vacuum tube based Erica Synths Fusion Series modules are the basis for this system, while Black Modulator and Black Envelope Generator add plenty of modulation and noise generation possibilities. It has 43 patchpoints for extensive experiments in sound design, all analogue signal and CV path to create the drones of massive power. Want a solid bassline with great 1V/oct tracking? Use CV/Gate sequencer or keyboard and you have it! Erica Synths Fusion Drone System brings distinct and powerful sound into eurorack.
Fusion Drone System includes:
Fusion VCO – Two double triodes in bistable latch connection act as suboscillators: -1 and -2 octaves with plenty of mixing opportunities for amazing sonic results. External audio signal can replace internal VCO.
Fusion Ringmodulator V2 – Germanium diodes enrich the sound by adding extra harmonic content meanwhile vacuum tube adds evilish overdrive to audio and carrier signals.
Fusion VCF V2 – Each side of the double triode drives signal between 2nd and 3rd stage of the filter, while germanium diodes are used to limit the output signal.
Black Modulator – a fully analogue modulation and noise source. Black 8-Multi – an advanced replacement for stackable patch-cables – it is active buffered multiple with signal status LEDs.
Fusion VCA V2 – a Russian miniature pentode 1ะ24B with power consumption comparable to an LED. Black EG – the ultimate control over envelopes in your modular system.
Fusion Delay/Flanger/Vintage Ensemble – a distinct multifunctional analogue effects module that combines BBD chip based effects with an adjustable tube overdrive in the delay output and a feedback path for extra thickness of the sound.
"With Vamp Apollo View modular took the early Korg MS-20 and MS-10 filter designs, which favoured non-linear character over stability and control, they added more character with a tube input saturation stage and tube resonance feedback path, further output clipping stage options and then designed in modern stability and control. I joke in the video the filter is so rubbery it might as well be wearing a gimp mask. Vamp is also multimode with low pass, band pass and high pass modes with routable pre/post VCA and gain option, smart normalled CV options and prevision circuitry to turn it into a full single module tube voice, killer kick drum and more.
VAMP is a multi-mode analogue filter that gives you low-pass, band-pass, and high-pass responses in a compact 8HP design. At its heart lies a classic Sallen-Key topology supercharged with real vacuum tube (12AU7) saturation and multiple stages of clipping, letting you move seamlessly from smooth, hi-fi filtering to snarling, overdriven character.
One half of the tube is used to saturate the input, while the other half provide MS-20-inspired resonance limiting (tube, not diodes). With FLOW placing the VCA pre-tube or post-filter, and FANGS selecting Off / Soft / Hard output clipping, VAMP ranges from subtle warmth to ferocious harmonic destruction. FEATURES Three filter modes: low-pass, band-pass, and high-pass Classic Sallen-Key topology with tube saturation and clipping 12AU7 vacuum tube: one half for input drive, one half for resonance distortion MS-20-style resonance limiting/clipping for aggressive tones FLOW switch: Integrated VCA pre-tube or post-filter FANGS: output clipping: off / soft clipping / hard clipping 1V/Oct cutoff tracking: use VAMP as a VCO in self-oscillation Extensive CV control: GAIN, FREAK (cutoff), REZ (resonance) (all with attenuverters) Self-oscillation for screaming tones TECH SPECS 8HP 30mm Depth 40mm Max Tube Height from panel Reverse polarity protected +12V 230mA -12V 70mA
"KAWAI 100F vintage analog powerful synthesizer, little monster just serviced and in very clean conditions with CV/Gate mod by kenton project 1v/Oct, it sound amazing! There are included 3x original rare patch charts (two blanks and one preset) in great conditions too"
Check with dealers on the right for availability. User video by Cinematic Laboratory further below.
PoliMATHS [MSRP: $459] is an eight-channel CV and Audio event generator for the New Universal Synthesizer System or any Eurorack modular synthesizer. It uses a single set of controls to generate complex functions at eight independent channel outputs. PoliMATHS’ functions are made up of two components: first, the well-known Rise-Fall envelope with variable Curve (familiar from the original MATHS and Function and 0-Coast Slope); and second, a variable-Shape Oscillation whose amplitude is controlled over time by the Rise-Fall envelopes. This oscillation can be either low frequency for the creation of complex control functions, or audio frequency for native generation of audio events/notes with optional tuned pitch control via 1v/oct control voltage. PoliMATHS also includes output headers for creating pre-patched connections to the control inputs of QXG.
PoliMATHS Part of the New Universal Synthesizer System Eight channel function generator with a single set of controls Create simple or complex functions Activate channels in many possible patterns using Channel Index, Round, and Parallel Modes Modulate parameters across channels with Spread or Modulation Dissemination Designed to work with MultiMod and QXG and future NUSS modules Chain to QXG for immediate eight channel amplitude control
The Quad Stereo Gate (QXG) [MSRP: $239] music synthesizer module is a Four Channel Stereo Low Pass Gate and Mixer. Like the DXG before it, the QXG utilizes a new low pass gate circuit that does not use vactrols. This circuit is 100% analog and its response was arrived at after many months tailoring it to meet or exceed the expectations that have been set by all the vactrol low pass gates that Make Noise has created over the years. Additionally the QXG adds a Vactrol button to select between a Slow, low-pass-gate-like response emulating the decay time of a vactrol (Vactrol button ON), and a Fast precision response that still maintains the gentle filtering characteristic (Vactrol button OFF). Fast response can be especially useful when patching QXG with complex and quickly-changing functions such as those generated by PoliMATHS with the OSC circuit in use. The QXG also includes a Stereo Sum Output with voltage controllable Stereo Spread to quickly route all four channels across the stereo field. Each channel also has an individual output that removes the channel from the Sum when patched. In addition, QXG includes signal and control input headers for creating pre-patched connections from the outputs of PoliMATHS and MultiMod.
Part of the New Universal Synthesizer System Four channel low pass gate Vactrol-free design for classic Low Pass Gate sounds Vactrol button to select Fast or Slow response Xpread parameter for spreading the four channels across the stereo field Summing stage with Stereo AUXiliary IN allows for chaining of multiple units, creating larger mixes Individual channels can be removed from Sum by patching to their respective outputs Designed to work with MultiMod and PoliMaths Chain two QXG units to a PoliMaths for immediate eight channel amplitude control
PoliMaths & QXG | How does it sound when you know nothing?
"Today MakeNoise has introduced PoliMaths and QXG. My dealer already had them in stock (!) and allowed me to buy them - under the strict condition to keep it a secret until after the official launch video. So I had the opportunity to make a video in one day, without access to any help from the manual or the MakeNoise launch video. Normally I'd do my homework first, but this opportunity is rare. Usually, I can intuitively figure out how a module works, but with PoliMaths, almost nothing is familiar, and what's familiar works differently. So I've probably been using a MonoMaths, but since I decided to get two, there's still a Poli vibe to it.
This is probably one of the worst videos I've made so far, but it's fun to patch in the blind with zero knowledge, and this was the only day I could record, edit and post it. So forgive me for being a MakeNoise groupie. I am biased, but I also think it's for a good reason. MakeNoise managed to make something extremely innovative. I'll make a proper video soon, and I'll figure out what to do with this one later."
"Virgo is not just a classic oscillator, but also a module capable of generating non-standard sound timbres.
In a small space (8HP), we have managed to include many functions and voltage controls to give you the ability to create your own sound.
Virgo features: double cross modulation (can modulate input and output) 5 output sources (4 classic shapes + 1 MORPH output) waveform modulation input PWM modulation stable and accurate 1V/OCT up to 8 octaves HardSync input MORPH selector switch MORPH CV input MORPH CV output The pitch drops to very low frequencies and can also be used as an LFO.
For more information, visit our website www.arcaico.eu"
"The ARKARION is a complete analog synthesizer voice, housed in a Eurorack module, with digitally controlled signal routing. It combines the tactile experience of analog patching with the generative potential of randomized patches, all controlled via a single button or external gate signal.
Inspired by a fictional "DNA synthesis" concept, the ARKARION interprets a virtual genetic code to define routing schemes for CV and audio. This allows complex, evolving sound design with minimal patching.
This synthesizer is designed for users seeking a unique blend of structure and chaos, combining traditional subtractive synthesis elements with a digitally modulated signal flow. Whether played from a MIDI source, sequencer, or by hand, the ARKARION delivers a wide range of timbres, from tightly controlled tones to wild and unpredictable textures.
"The second V/oct input on CYCLE 5 is interesting to use for transposing the pitch of the VCO. When using the precise 1V outputs of ROUTE 4 (with the help of C2) you can create arp jumps across a few octaves. Let's figure out how I did it."
"Tasteful design and even tastier tone — that’s Weston Precision Audio! ๐️ Met Devin at Buchla and Friends earlier this year and it was an absolute treat ๐
Starting with the SV1: a dual stereo VCA with both vintage and clean paths — four VCAs in total ๐ฅ Vintage brings warm saturation with discrete transistors, while the clean side is modern, transparent, and tight ๐ฏ Run it in mono or stereo, link controls, bias your CV, and boost gain up to +6dB. Need grit? Crank the input or flip the Overdrive switch for creamy distortion or sharp clipping ๐ฅ And yes — zero-crossing detection eliminates clicks from fast envelopes. Smooth as ๐ง
Next up: the SF1, a stereo or dual-mono VCF with two identical 4-pole filters. Switch between LP, HP, BP — or tap into notch, all-pass, and phaser outputs too ๐ Link the filters or keep them independent. Modulate everything, shape stereo motion, or use it as a sine oscillator with 1V/oct tracking ๐ถ It’s a filter, it’s an oscillator, it’s a full-on sound design weapon ๐งช
Head to WestonAudio.com to dive deeper. And shoutout to Pig Hog for keeping the patch bay clean ๐⚡️
"The TZ Dual VCO is two full featured VCOs on in a single 16HP module. Both VCOs output sine, square, saw, triangle and PWM wave forms. Each VCO also has thru-zero and expotential FM input. The type of FM is selectable using a toggle switch. An important feature of TZ Dual VCO is the FM input for each VCO can be control by a VCA input. A potentiometer adjusts the overall maximum of the FM input while the VCA provides an amplitude envelope.
Each VCO has the following inputs:
1V/Oct PWM CV FM signal FM signal VCA Each VCO has the following wave form outputs:
Sine Square Saw Triangle PWM Each VCO has these adjustment knobs:
Coarse Fine PWM FM amount The upper VCO can be synced with the square wave of the lower VCO. A three position toggle switch is used to select hard sync (up), soft sync (down), or no sync (center).
XR22 VCO FT
VCO with Ring Modulation Input and FSK (Frequency Shift Keying)
Amplitude Modulation (AM) Input
Ring modulation
CV controllable sine/triangle volume
Advanced waveform generation by AM
Rgb-LED for optical control
FSK (Frequency Shift Keying)
Pulse and ramp generation
Switching between two different frequency CVs
Advanced waveform generation by FSK
LFO-, Bass-, High- Mode
Switchable Sync-Mode (from Rev.6)
The XR22 VCO FT is a VCO with amplitude modulation option – which can be used for volume control, or ring modulation of the oscillator’s sine/triangle output. The AM-input signal is added to a DC-voltage adjustable by knob ‘Gain’ (between ca. +/-5V) and the sum voltage is being internally multiplied with the sinewave/trianglewave The result is an oscillator amplitude depending on the ‘Gain’-DC plus AM-input signal.
The applied AM-input signal can be mixed to the VCO output signal (modulated or unmodulated) too – a kind of ‘dry/wet’ control with the mix provided on the sine/triangle output. With no AM-input, the XR22 VCO FT behaves like a normal sinewave/triangle VCO, then its volume is controlled by knob ‘Gain’. Whereas with the knob ‘Gain’ in center position, the oscillator tone is becoming almost muted, and the input signal on ‘AM in’ controls the amplitude of the wave completely; thus the VCO can be used as a ring modulator.
The FSK (frequency shift keying) option provides two internally switchable different oscillator frequencies F1 and F2; each controllable by the two big-sized knobs (and their respective fine-tuning knobs and CV inputs). Switching between F1 and F2 can be done manually or by a logic signal (e.g. a gate signal) applied on input ‘FSK in‘.
Further, it is possible to use the XR22 VCO FT‘s squarewave output for FSK switching. This will result in ramp or sawtooth (on the sine/triangle output) and pulse (on the squarewave output) waveforms. The falling and rising edges of the of the sine/triangle signal and the duty-cycle of the squarewave output are independently adjustable, and/or controllable via CVs of F1 and F2.
Furthermore, there is a switch for linking F1 to F2. In this case, the ratio between F1 and F2 is remaining the same, independently from the frequency, and ensuring properly 1V/oct. CV tracking.
A switch allowes to enable ‘sync mode’: An applied trigger will restart the wave always at the same point, useful for synced LFO applications and more.
For optical control, the XR22VCO FT has a full-color LED for AM visualization and a 2-color LED for FSK control.
"Arcaico Murena is a feature-rich analog module designed to deliver a distinctive, unpredictable, and versatile sound. With a width of 26 HP and a depth of 38 mm, the Murena is a concentration of functionality in a compact space.
A 6-channel mixer, each equipped with a distortion VCA, attenuverter and switches to select the internal routing destination. The channels are divided into two groups of 3, allowing flexible stereo management. Each VCA can be controlled either manually via the panel or via bipolarized CVs, offering extensive modulation possibilities.
Each group of 3 channels terminates in a multi-mode filter , capable of generating extremely aggressive sounds. After the filter, the signal can be routed to a distortion or directly to the mix. This configuration allows the two groups to be treated as a stereo pair or to use A-B crossfade modulation for dynamic transitions.
Every parameter of the Murena is manageable either from the panel or via CV, offering complete and creative control. The ability to patch the module to itself allows endless sonic combinations to be explored, making each use unique and unpredictable.
6-channel MIXER/VCA with CV attenuverter, cv and switch for routing (3-channel stereo mixer or 6-channel mono mixer or a combination of both)
Independent mono output of all 6 channels (clean)
2 multi-mode VCFs (LP/BP/HP) at 12db/oct with CV attenuverter, independent clean outputs, indepentent distorted outputs, fade output and 1V/Oct control (tuned up to 5 octaves)
OVEDRIVE with cv control on each filter
Stereo/mono/dual mono output and mono A+B output controllable via cv
"The Fancyyyyy K-Accumulator is a revolutionary stereo complex oscillator that combines cutting-edge synthesis techniques in an intuitive, hands-on architecture inspired by classic complex oscillators. Designed in collaboration with Grrrwaaa aka Graham Wakefield, creator of Max/MSP's gen~ platform, fans of experimental timbres and novel synthesis techniques are right to celebrate K-Accumulator's emergence into the Eurorack landscape. Seamlessly combining pulsar synthesis, phase modulation, and complex 3D waveshaping, K-Accumulator pairs its modulation and carrier oscillator pairs with an onboard function generator, pattern generator, and flexible root frequency quantization and manipulation, providing fruitful terrain for exploring captivating timbres in systems of any size.
"Bastl CITADEL - Fortress of Modular Magic - is a Eurorack reimagination of the popular Kastle 2 semi-modular desktop device. The CITADEL comes with a full 3.5mm patch bay that offers the flexibility needed in the Eurorack format while maintaining the strengths of the Kastle 2 allowing it to stand on its own, and yet let it truly shine when patched with other modules. We’ve also added switches
