From the creator: "My name is Dani and I am about to release my first Eurorack module, which I have been working on for the last few years: it is called zerua nahasi, and it is a 4-voice granulator with multiple internal and external modulation options, various ways to combine and synchronize the 4 voices, multiple grain engine types (varispeed, (paul)stretching...), and an integrated convolution reverb with custom impulse responses. You can learn more about it at sbrkdevices.com.
The module will be released in automn this year, but in a few days I will be showing it at Superbooth in Berlin. If you plan to be there, you are more than welcome to come visit us, we are in the headphones only area, at booth W241."
zerua nahasi is a polyphonic granular synthesizer for the eurorack modular format, with a wide range of granulation possibilities. it features 4 stereo granular engines that can be used independently or in combination, opening a whole palette of possibilities. samples can be loaded from an SD card, or recorded via the stereo audio input. each granulation engine can use the same or different samples as sources for granulation. a live mode is also available, where the device works as a granular delay. zerua nahasi aims to work as a granulation l a b # r & t @ @ !.
furthermore, this device also includes a stereo convolution reverb, with some built-in impulse responses with barcelona's most iconic spaces, and the possibility to load custom IRs from the SD card.
- features -
4 stereo granular engines - each slot can hold over 20 seconds of audio.
the 4 engines can be synchronized and combined in multiple ways.
main granulation parameters with CV control and randomization: grain position, grain length, density, pitch/speed, envelope shape, stereo image.
multiple granulation modes: varispeed, stretching, and more to come.
onset/transient detection.
granulation sources: stereo input audio (live or pre-recorded), or samples from SD card.
integrated convolution reverb. IRs can be loaded from SD card.
Drum Farm is a Eurorack module dedicated to the cultivation and un-ethical treatment of drum sounds. It combines real-time drum synthesis, effect processes and sampling into a hands-on, multi-engine instrument, delivering up to four simultaneous voices and three effects at once."
Press release follows:
Knobula cultivates new ground in drum voice design with Drum Farm performance-focused Eurorack module
LONDON, UK: advanced modular synthesiser developer Knobula is poised to cultivate new ground with its upcoming Drum Farm Eurorack module — merging synthesis, sampling, and real-time effects into a single, hands-on instrument built for fast, intuitive sound design, empowering users to relentlessly sculpt, process, sample, and re-sample sounds grown from its wide range of virtual analogue and physically modelled drum and effects algorithms — readily representing the latest addition to its growing lineup of control-centric instruments embodying a no-screen, no-preset philosophy, as of April 21…
As an appropriate appellation, Drum Farm was inspired by Knobula Technical Director Jason Mayo’s background in computer animation, where vast ‘render farms’ generated thousands of realistic images with minimal human input; as a performance-focused Eurorack drum module occupying 24HP of rack space, it is organised into three core sections: a Drum Synth with 16 virtual analogue and physically modelled drum algorithms, an Effects engine offering 16 different realtime processes, and a digital Sampler with up to three playback voices — capturing the combined output of everything a creative user could conceivably do with it. By bringing all the essential building blocks together, Drum Farm allows for the creation of original sounds quickly and intuitively — whether shaping punchy kicks, layered snares, tuned percussion loops, cymbals, CV/Gate-controlled samples, or physically modelled drum membranes.
Moreover, Drum Farm’s onboard sampler can run automatically in the background, sampling into one of 16 sequential audio buffers. Ultimately, users can capture the drum synthesiser on its own or record hybrid combinations of synthesis, effects, and samples, which can themselves be resampled into richly layered percussion structures or loops. Additionally, an EXT (external) input opens the gate to the world of field recording or sampling directly from elsewhere in a Eurorack system and a row of CV and trigger inputs allows further influence to any assignable control, including the ability to switch samples, drum algorithms, or effect types on the fly.
Duly designed for fast, intuitive sound creation, Drum Farm positively encourages an immediate, iterative workflow — simply select a drum model, sculpt it, process it live through the effects, sample the result, blend it with another model, and repeat. As a result, complex and evolving sounds quickly emerge.
Embodying Knobula’s philosophy of promoting experimentation and tactile control reminiscent of classic real-world instruments, Drum Farm features no screens and no sub-menus. Instead, it is a performance-focused module that rewards hands-on exploration, invites happy accidents, and provides a fertile environment for sounds to flourish and grow.
It is possible to create fully hands-free generative patches, self-building sample libraries, or access to round-robin multi-samples since all controls are CV- or trigger-assignable via five CV/Gate inputs. Sensibly, sounds can be saved to a microSD card alongside a complete snapshot of the module itself, whereby buffers, knob positions, samples, and settings are stored together as a session — with up to 32 sessions per card — allowing users to return to their work, exactly where they left off. It is fair to say, therefore, that Drum Farm is always ready for both studio experimentation and live recall.
Thanks to Knobula cultivating new ground with Drum Synth, the relentless creation of drum parts in Eurorack has never been more immediate or rewarding. Attendees at London Synth & Pedal Expo 2026 may recognise the farm-themed product tease, with ‘alien cow abduction’ subsequently forming the core of Drum Farm’s promotional campaign video.
Shipping scheduled for June 2026, Drum Farm will be available to purchase — priced at £449.00 GBP (including VAT), with a choice of two faceplate colourways on offer — directly through the Knobula shop (https://www.knobula.com/shop), as well as via Knobula’s growing global network of resellers.
For more in-depth information, please visit the dedicated Drum Farm webpage here: https://www.knobula.com/product-page/drum-farm
"A while back, I took a look at the Pet Rock temporal synthesis module. Supra is the follow up to that module. It produces different rhythms, CV, and melodies based on the passage of time. It actually pairs nicely with Pet Rock.
Time Travel CV Playground
A new Eurorack module from Jonah Senzel, creator of Pet Rock
Input & Output Jacks
The top of the module features eight jacks labeled for dual-hand control:
Left Hand in 1 & 2 (Top left)
Left Hand out 1 & 2 (Bottom left)
Right Hand in 1 & 2 (Top right)
Right Hand out 1 & 2 (Bottom right)
Core Controls
SWAP BUTTON: * Switches which hand you're viewing and controlling.
The other hand continues to run in the background.
Hold to place a new object in the current hand.
JOYSTICK: * Up, Down, Left, Right, and Click (Push In).
MENU: * Menu with extra features of current mode.
OPT: * Extra button for use in some modes.
"This is a pure modulation party in a small footprint. The Morph and Merge functions provide access to complex waveforms for a wide range of modulation. Distribute them across your rack via nine outputs.
Each LFO offers fast or slow cycling, with selectable square and triangle shapes. The fast cycles reach into audio territory at around 100 Hz, making it useful for percussive modulation and low-end movement. In slow mode, cycles extend up to ~35 seconds. With external negative CV, this can be pushed into the range of around 10 minutes.
Blend the LFO signals, or any external signals (including audio), in the Morph section. Or use the signals in the relational logic section, Merge, which opens up a wide set of derived waveforms by slicing, combining or rectifying. Pseudo waveshaping.
"In this sketch, we demonstrate how a pair of Fractalists is working together in a timbral progression.
The left one is responsible for the bass sound, where, with each iteration, the waveform is unfolded, becoming more and more complex and rich in harmonics.
It is also modulated a bit with a built-in LFO patched into the WARP input to add some movement.
The right one produces a percussive part. The actual base frequency is very low, and with a standard oscillator, there will be no sound or only a rumble.
Here is a different story. As the generated waveform is very complex and contains a lot of harmonics, they become audible as rhythmic patterns.
With each iteration, this effect is more prominent. WARP is not modulated to have this specific pattern to be fixed, but if you were to change it, there are a lot of different patterns to look for. In future episodes, we will explore this in more detail.
Audio is intentionally captured raw, without any filters, VCAs, or effects."
Fractalist from Blukac is a unique digital oscillator that creates complex waveforms and rhythmic undulations using fractals, generating captivating sounds that evolve and grow into digital chaos. Start by selecting a core waveform, either triangle or trapezoidal, and expand its fractal dimension with the Iter control to create iterations on this shape, adding harmonics to the sound that bloom in digital bliss. Through all these fractal transformations, Fractalist's output maintains its periodicity, with a Frequency control that can be used to shift in octaves, semitones, or fine-tuned between notes. At low frequencies, Fractalist becomes an oddball rhythm machine, churning its mathematical movements in unique patterns according to the waveshape created through fractal expansion.
Select your desired degree of digital artifacting with the Alias switch, inviting or omitting the unique sounds of system failure as your harmonics grow beyond the bounds of Fractalist's digital structure, folding frequencies back on themselves for inharmonic results. The onboard Warp control can be used to further modulate the timbre of your sound, alongside dedicated inputs for frequency modulation and hard Sync. Finally, a saturating boost is available to add heat to the cold digital output, while a friendly adjustable LFO provides an onboard source for modulating Fractalist's bevy of CV inputs. With its unique synthesis engine and plentiful opportunities for creative patching in a broader Eurorack environment, Blukac's Fractalist is sure to expand your sound palette, and perhaps, your mind.
The Arplus module from Zlosynth Instruments is a robust Karplus-Strong 6-voice resonator that gives you a bevy of musical scales at your fingertips. The Arplus works by selecting a particular chord based on the scale you select, stepping through the notes of that chord via the Trigger input and button. Use the Tone control to set the root note, and use the Chord control to select the particular chord. Both controls have corresponding CV inputs that let you create intricate sequences or melodic randomness. Choose from 31 different types of scales that include Western, Arabic, Indian, Japanese, and even quarter tones.
Internally, a burst of noise gets generated to create the sound, however, if you want more control over your noise bursts, an external input is available for you to patch in whatever you'd like. Use the String control to adjust how many virtual strings remain resonant after the trigger—up to 6 strings can resonate at a time allowing for soaring expanses of ambience and gorgeous clusters of notes. Sculpt the sound right on the module with a built-in filter, including resonance and cutoff, along with a Contour control that moves from short percussive bursts to long swells of washed texture.
Of course, no resonator would be complete without a stereo output, and the Arplus doesn't disappoint. Choose from three different stereo spreads: Ping Pong, which alternates voices between left and right, Root, which sends the Root to the Left and everything else to the Right, and Haas, which creates a stereo spread using the psychoacoustic Haas effect. The Arplus from Zlosynth is more than just your typical resonator, with an easy-to-read scale selector and a lovely sound that's sure to win over your heart and ears.
ARPLUS FEATURES
6 Voice Karplus-Strong resonator External audio input for custom excitation sources 31 Different scales Customizable chords up to 8 notes CV-Controllable arpeggiator patterns Quantized 1V/Out output 3 Stereo output modes Built-in filter
"Yes, it very much will drum. The M1 dark system is a fully modular (Eurorack compatible )system in conveniently compact desktop format. No external modules or effects are used in this video.
Dark system M1 is an analog modular monophonic synthesizer voice, in eurorack format, completely patchable with 8 step sequencer , fuzz and delay effects.
Modules:
1-Sequencer 8 , a modern version of the classic Baby8 analog sequencer. 2-Sub Vco , sawtooth and pulse oscillator, 1 v per octave compatible, also includes a noise source and one or two octaves sub square waveforms, selectable with toggle switch.
3-Transistor ladder VCF , modern version of the classic moog ladder filter, capable os self oscillating
4-EG2 , dual ASR envelope generator, with loop capabilities for use as a sort of low frequency oscillator.
5-VCA4 , quad voltage controlled amplifier, with per channel gain and summed output for use as a voltage controlled mixer
6-Delay , pt2399 based , with modulation input and self oscillations
7-Crash Fuzz , a wild square wave fuzz , with modulation over pulse width (color) , and internal triangle LFO for modulating color
8-HRmixer , 4 channel mixer with global gain, vu meter led level indicator, and headphone output.
Specs :
dimensions : 58HP width m 3U height in Eurorack standards
Power requirement : 9VDC 0.5mA center negative (included)
"Fractaos est un oscillateur polyphonique stéréo fondé sur la synthèse fractale.
00:00 – 02:17 : une présentation rapide pour expliquer les grands principes du module
02:17 – 17:04 : découverte de quelques presets
17:04 – fin : exploration libre et... improvisée
Fractaos is a stereo polyphonic oscillator built around fractal synthesis.
00:00 – 02:17: a quick introduction to the main ideas behind the module
02:17 – 17:04: a walkthrough of a few presets
17:04 – end: free exploration and improvisation
This is the first post to feature the Beers Melakarta.
"Feeding the Beers DAC and Beers Melakarta several triggers from ALM Pamela’s New Workout, and then modulating the pitches of the two Metasonix RK7 VCOs and the CV on the Metasonix RK8 Filterwall. Gated reverb from the Alesis MIDIVERB II."
"The idea for this module came from my friend Rodrigo Kendrick. He was a bit burned out on western tonal structures, and had recently missed out on an electronic lehra machine in a facebook marketplace deal which fell through. These machines are a kind of practice tool for carnatic musicians that plays a wide variety of different raga. Think that 'casio auto-chord' function on old casio keyboards, but for carnatic music.
Unwilling to wait for another one to come up on the used market, he did some cursory research, and sent me an early-morning design document, expanding the functionality of DAC with a scheme of two rotary switches and one toggle switch to select the pitch sets for all 72 Melakarta ragas and specified a clock input that would run up and down the selected raga in ascending then descending order, with the ability to turn around or reset on command. In theory this would allow the complex rhythmic and sequence rules of the raga to be implemented with external logic and sequencers, but still give the module enough sequencing functionality to explore the pitch sets of these raga on it's own.
I got excited and went a bit silly 'helping' until we had shoehorned in a pile of other features like binary addressability of the selected swara (interval), gate outputs for each swara, an 'inhibit' input that mutes the transposition voltage while the clock continues in the background, CV controlled halving of the clock frequency, extra +1oct input, and the logic-inverting toggle switches from the DAC on several inputs.
This design is all analogue using discrete MOSFETs and 0.1% tolerance resistors in a weighted DAC driven by a 4000-series CMOS based sequencer.
Yes, it might have been simpler to use a microcontroller."
"Bastl Déjà vu is a Swiss knife for your Eurorack System that adds fader control to your modular system for many scenarios. It stands out as a simple yet powerful utility module that can do crossfading, mixing, signal boosting, voltage processing, attenuation or attenuversion. All that in 4HP and with the possibility to chain several of them to mix even more signals."
Powerful Voltage Utility module for voltage processing, attenuation, signal boosting, crossfading, and mixing
Déjà vu adds fader control to your modular system and it stands out as a simple yet powerful utility module that can do voltage processing, mixing, attenuation, attenuversion, signal boosting, crossfading and mixing.
All that in 4HP and with the possibility of chaining several units to mix even more signals.
SWISS KNIFE FOR YOUR RACK
Déjà vu has two almost identical channels A and B. Each channel has the FADER input and the ADD input and an output with light indication. The FADER MODE switch alters the behavior of the module, either attentuating or attenuverting the FADER input where the ADD input will be added to the processed FADER input. The last option is crossfading between the FADER Input and the ADD input which is great for creating performance oriented macro controls.
"Q DRM - 4 is an analog Eurorack module with four independent drum voices. Its Twin-T resonator design delivers 808-inspired bass, tom, and percussion sounds when triggered — from claves and rimshots to bongo- and conga-like tones. The color-coded controls let you dial in each voice’s fundamental range, while separate outputs per voice provide maximum flexibility for patching, mixing, and further sound shaping. More info and sound examples: https://www.orpho.de/qdrm4/"
single 1U version - https://www.nonlinearcircuits.com/mod..."
"This module is a set of 4 reverse sigmoid chaos circuits, running at different frequencies, there are pots to feed each section into another and influence, sync – sort of, the action. There are also CV inputs for each section which affect the reset or crossover timing, for the faster ones the results are obvious. For the slower ones, give it a few hours.
The reverse sigmoid circuits are similar in concept to the mackey-glass based design used in the NLC Frisson, but are greatly simplified to a bare minimum of parts. Simply an integrator, two all pass filters and a nonlinear stage with two feedback paths. The nice thing about them is you can use any capacitors you like, so long as all three are the same, and the circuit will work with no other mods required. The sections in this module use 1uF, 10uF, 2x 1000uF in series (so 500uF) and 2x 2200uF in series (so 1100uF).
They work quite differently to the Sloth chaos circuits, with a number of ripples or rolls between each attractor, also the three outputs track each other, the faster ones are delayed by a few seconds, the slower ones by minutes. The intent of having 4 different circuits running together with pots to get them to influence each other is to have a module that can create longer tracks with many different but related musical events happening and, of course, weird delayed CV effects. Think of a band where the members all do their own thing but every now and then the sounds and patterns connect and achieve structure, which slowly scatters and reforms in new ways.
Feel free to change the 1uF caps to a higher or lower value, similarly for the 10uF. Stack capacitors on top of each other to get 20uF, or use Tayda 22uF caps and stack them. See pictures on pg6 for info on which caps to change. Make sure the capacitors have at least a 25V rating or higher.
If you want to use larger values than 1000uF and 2200uF, make sure they will fit on the PCB and/or thru the panel holes (1000uF on PCB are 10mm diameter, 2200uF panel holes are 16.8mm)
There are also two difference rectifier circuits which output complex mixes of the individual chaos circuits."
1U REVERSE SIGMOID DESCRIPTION/USAGE
6hp
This module is a reverse sigmoid chaos circuit; it can be built to run as a fast or slow CV source, or even as an audio/noise source. This is a single version of the four chaos circuits in the NLC How’s the Serenity module.
The reverse sigmoid circuits are similar in concept to the mackey-glass based design used in the NLC Frisson, but are greatly simplified to a bare minimum of parts. Simply an integrator, two all pass filters and a nonlinear stage with two feedback paths.
The nice thing about this design is you can use any capacitors you like, so long as all three are the same the circuit will work with no other mods required. The capacitors are marked ‘C’ on the PCB, 1uF is a good mid-range value to install, but 10uF, 22uF are good too albeit much slower. Lower values than 100nF get you into audio rate territory. Make sure the capacitors have at least a 25V rating or higher.
This works quite differently to the Sloth chaos circuits, with a number of ripples or rolls between each attractor, also the three outputs track each other, the faster versions are delayed by a few seconds, the slower ones by minutes.
The Input expects a positive CV, negative going CVs won’t hurt but will have no effect. The CV signal feeds into the first all-pass filter stage via 10k and a diode, this is different to the method used on How’s the Serenity. On slower builds, using 10uF caps, the effect of the CV will be washed out to some extent. It will still have an effect but not as noticeably as on the faster versions.
"Parapulse is a Eurorack noise generator with an integrated filter and frequency modulation. From crisp white noise to warm pink noise, it opens up a wide range of textures, atmospheric layers, and organic impulses.
From icy fog and cosmic dust to Geiger counter clicks, paranormal intergalactic tones, and fine vinyl crackle, *Parapulse* puts noise in motion.
In this demo video, Parapulse is used together with the Bode Frequency Shifter for sound manipulation. CV control is also provided by the [Orpho Voltglider (https://www.orpho.de/voltglider/) and a CV joystick.
More information at [www.orpho.de](https://www.orpho.de)"
Googlish (original German below):
The Parapulse Noise Generator—equipped with an integrated filter, frequency modulation, and the ability to transition seamlessly from white to pink noise—offers a rich palette of soundscapes for experimental musicians and sound designers. The module provides a wide variety of noise types, ranging from crisp, high-frequency white noise to soft, deep pink noise, making it ideal for generating atmospheric textures or serving as a foundation for percussive elements and effects. The built-in filter allows users to precisely shape the frequency content of the noise, enabling the creation of both subtle timbres and dramatic effects. Frequency modulation further expands the sonic spectrum by facilitating dynamic shifts and modulations within the noise, resulting in complex sonic textures. The seamless adjustment between noise colors—free of audible steps or interruptions—offers a unique level of flexibility and control that would not be possible with a conventional white noise generator.
Original German:
Der Parapulse Noise-Generator, ausgestattet mit einem integrierten Filter, Frequenzmodulation und der Möglichkeit, nahtlos von weißem zu rosa Rauschen zu wechseln, bietet eine reiche Palette an Soundlandschaften für experimentelle Musiker und Sounddesigner. Das Modul bietet eine Vielzahl von Rauscharten, von klarem, hochfrequentem weißem Rauschen bis hin zu weichem, tiefem rosa Rauschen, ideal für die Erzeugung atmosphärischer Texturen oder als Grundlage für perkussive Elemente und Effekte. Das eingebaute Filter ermöglicht es dem Benutzer, die Frequenzanteile des Rauschens präzise zu formen, um sowohl subtile Klangfarben als auch dramatische Effekte zu erzielen. Die Frequenzmodulation erweitert das klangliche Spektrum zusätzlich, indem sie dynamische Veränderungen und Modulationen im Rauschen ermöglicht, was zu komplexen Klangtexturen führt. Die nahtlose Einstellung zwischen den Rauschfarben ohne hörbare Schritte oder Unterbrechungen bietet eine einzigartige Flexibilität und Kontrolle, was mit einem herkömmlichen White-Noise-Generator so nicht möglich wäre.
"Eddy is a three channel stereo CV controlled mixer with sidechaineable compression and distortion, designed as a compact submixer. It also has normalized feedback paths for more experimental tone shaping, no input mixing, and percussion synthesis workflows.
The Cascade expander allows access to the individual VCA outputs for use as a triple stereo VCA as well as access to the feedback filter outputs and simultaneous clean, compressed, and distorted bus outputs for additional mixing and processing options."
00:00 Intro
01:02 Mixing/VCA basics
02:20 Sidechaining
02:50 Feedback and percussion patching
04:33 Gain amounts and headers
04:45 Cascade expander
06:00 Using as compressed drum submixer
09:16 Jamming hard
12:00 Jamming even harder
Eddy & Cascade - Triple stereo VCA and feedback machine
"New Schlappi Engineering module alert!!!!
Welcome Eddy and it's expander, Cascade.
Eddy is a three channels stereo VCA and mixer, with normaled tuned feedback paths, mute and phase invertion switches, compressor and distortion modes and more.
The Cascade expander allows you to tap different outputs of the circuit individualy for parallel processing or feedback patches."
00:00 Intro
01:14 Hello Eddy
04:25 Eddy panel
05:51 Cascade panel
06:22 It's a drum module!
08:57 No input mixing
11:09 Patching with Cascade
14:37 Simple waveform mixing
18:18 Optional levels
19:20 Drum machine time
25:35 Breakbeat time!
30:30 End talk
"Nyquist Nightmare by Modular 4 the Masses
12hp Wacky FM Synthesizer designed to emulate the sounds of scanning radio frequencies and more!"
Modular for the Masses
Nyquist Nightmare
Audio Mangling Modulator/Demodulator
This module is a modulator/demodulator. The top four knobs interact with each other to take a signal and mangle it beyond all recognition, or if you're patient and lucky, let the signal come through mostly unchanged.
What is going on there? you ask. The input is used to frequency-modulate a VCO that can oscillate beyond anybody's hearing range. The resulting (possibly ultrasonic) signal frequency-modulates a second identical VCO. This leads to the kind of signal degradation you might expect from an AM radio transmission. Or a short wave signal fighting its way through a hurricane.
The rest of the knobs control filtering; high-pass to remove the truly ground-shaking rumbles the top for knobs can generate, and resonant low-pass to get the harsh high pitches out of the signal, and emphasize (for example) the frequency range of human speech, if you want to pass old movie dialogue through this.
Also included are a wet/dry control (while prototyping this module I would sometimes spend minutes looking for the perfect knob settings to allow a signal through just to realize the signal source had stopped playing), a CV input for the low-pass filter with an attenuator knob, and a effect volume knob.
Some fun things to try:
with zero input, try to get a modem sound!
connect a simple waveform and massage the top four knobs to fold the wave in surprising ways
David Lynch. Put David Lynch through this.
turn the resonance of the low-pass VCF up and use this as a VCO (not 1V/oct, I'm afraid
Turn both "Carrier" knobs all the way down, so the VCOs are stalled, and listen to the signal bash its way through
"Listen the new Radical Frequencies Dual Retro VCO playing an arpeggio , showing all waveforms and making Pulse with modulation and Hard Sync between the vcos . It goes through the RF Mixer and then to Diode Dream Vcf as it suits this oscillator perfectly! #eurorack #modularsynth #radicalfrequenciesmodular #dualretrovco #drvco #diodedreamvcf #analogsynth"
"Handmade Dual VCO of discrete core capable of internal FM cross modulations - Hard sync and Ring Modulator
• Analog discrete saw core oscillators with Saw, Pulse, Triangle and Ring Modulation wave outputs.The sound is warm and fat, emphasizing odd harmonics for this big retro sound. My purpose here is to approach the sound of classic synths from 70s, that we all loved. • The SAW wave produces rich bass frequencies, sweet mids and smooth highs but overall, it is still well balanced across the full frequency range. The Triangle wave is almost perfect in shape with no buzzy hum sound. The pulse wave can produce that chorus-like phasing effect, when using an LFO to modulate the PWM input and does so in a very unique way, as it changes the phase of the signal as well. • Two identical VCOs : VCO ALPHA and VCO BETA, with the ability of hard sync as each VCO syncs internally with the other. Using the attenuator knob for SYNC, you can go from zero to soft sync(11-12 o’clock) to hard sync when the knob is fully CW. For syncing you just need to turn CW, the sync knob of the VCO you want to be the slave. Don’t open both the sync knobs at the same time unless you want to make some weird sounds. • There are external sync inputs for each VCO as well. External oscillators can be used as masters, just feed the output of the oscillator of your preference, into the sync input or either ALPHA or BETA. Just remember to feed a saw or a square wave, into the SYNC input. This is very important in order to sync the oscillator. A ramp wave it will not sync at all! (The RF DPVCO for example is a ramp out VCO and if you want to use it as master you must invert the signal first.) • Both ALPHA and BETA track 5 octaves accurately, tempco resistors are attached to the tuning ICs CA3046 on both VCOs. Separate voltage regulators for each oscillator can achieve the best sounding results without drift or bleed pitch, between VCOs. • Both VCOs go from a relative fast LFO range with the coarse tuning knob fully CCW, up to high frequency oscillation. • Octave Switches of 3 positions: 1 octave down - , zero , 1 octave up +, are available and make patching, fast and intuitive. • There are internal normalisations for exponential as well as linear FM and both have independent EXP FM and LIN FM, attenuators. • You can select the wave for the internal FM buss via the front panel switches .Options are Triangle and SAW. The internal FM wave, is independent per VCO as well. • There are also internal normalisations for PWM, where each VCO modulates the pulse width, of the other and both use the triangle waveform. • There is a PW offset, per VCO - negative phase pulse width at CCW to + positive phase at CW and 50-50 duty cycle square wave, in the middle of the knob. • Ring Modulation section is a separate feature where X and Y inputs are internally connected with the VCOs as well. It has 2 inputs, X and Ψ and one out, RM. The inputs are internally connected to the internal FM buss switch of triangle - saw selector. VCO ALPHA is internally connected into Ψ input and VCO BETA, into X input. You can feed the RM inputs any wave you desire from other VCOs as well . • An external patch cable breaks the normalisation of all internal connections, via input jacks. (EXP FM, LIN FM, PWM, SYNC, X Ψ)
• Important note about tuning : The vcos need at least 30 minutes warm up before using it for good tracking. Also when you have to tune the vcos it’s better the octave switches to be in the middle position and all the fm and sync knobs must be closed (CCW)
• Large range of sounds with countless sweet spots - ultra stable tuning for FM sounds by using the FM and SYNC knobs simultaneously - fat basses, classic leads and drones. Feed the DRVCO into a good filter and you will enjoy it as it was meant to be! The VCF that I suggest is the RF Diode Dream VCF as it is a ladder filter and suits it perfectly! Of course any other filter of your taste can be used with great results."
zerua nahasi is a polyphonic granular synthesizer for the eurorack modular format, with a wide range of granulation possibilities. it features 4 stereo granular engines that can be used independently or in combination, opening a whole palette of possibilities. samples can be loaded from an SD card, or recorded via the stereo audio input. each granulation engine can use the same or different samples as sources for granulation. a live mode is also available, where the device works as a granular delay. zerua nahasi aims to work as a granulation l a b # r & t @ @ !.
