"The CubuSynth Engine is a Dual analog VCO with wave shaping functions, internal modulations and a chaos generator. It is based around the 3340 chip and features 4 Waveforms per VCO and 4 Modulated Outputs, all simultaneously."
CubuSynth Engine Prototype noodling
"Been busy over the last months to develop a dual analog complex VCO for Eurorack.
This is a Prototype quite close to the finished module."
Complex analog dual VCO
Designed to bring a complex VCO, with a huge amount of possibilities and internal modulations to the DIY world, this module stands out for its visual appearence as well as its audible quality and possibilities
How it works
The CubuSynth Engine can work as 2 independent VCOs, or as a complex FM oscillator with its several modulated outputs.
With its inernal 'Chaos Engine' it creates semi-random voltages, generated by the 2 oscillator cores. This signal is then normalized to the CV inputs for Pulse width modulation and exponential FM.
Each of the 2 VCOs offers a switch to select one of the 4 waveshapes to be used by the wavefolders, and the linear FM input normalisations.
"Our new Sequencer / Touch controller is now available for pre-sale.
Use Code SEQ10 to save 10% off here: https://cubusynth.com/products/cubusy...
Shipping starts in August.
"The CubuSynth ConseQuencer is a powerful tool to create generative, randomized, and complex sequences and melodies on the fly. Featuring touch-activated step selection, versatile gate modes, and configurable CV outputs, this sequencer offers unique possibilities and control over every note. With built-in clock generation and division, five sequencer modes, and a pitch quantizer, the ConseQuencer influences the behaviour of every note that makes part of your Melody, ensuring dynamic and evolving patterns. Perfect for both live performance and studio production, the ConseQuencer brings your musical ideas to life with precision and flexibility.
Key features
Touch-Activated Step Selection: Instantly activate and set start points with intuitive touch plates.
Five Gate Modes per step: Choose from HOLD, TRIGGER, REPEAT, RANDOM, and OFF for versatile step behavior.
Dual CV Outputs: One Quantized Pitch output from the faders plus a second CV output
Clock Division Control: Adjust the clock cycles per step with a five-position switch for complex rhythmic patterns.
"Different ways to use random triggers and voltages with the CubuSynth modules which result in unexpected results and very interesting sounds.
This patch is fully stereo and is using the CubuSynth Engine (Dual VCO), the Dual CS-20 VCF and the Dual Vintage VCA.
Chapters: 00:00 Filtermodes with Saw wave on Input 01:50 VCA on Input stage 02:45 CV (from LFO) on Cutoff Frequency 03:45 CV on Resonance 04:18 "Ringing" mode with Square LFO on Input 05:02 Quantized 1V/Oct on Freq CV + Melodic Jam 09:30 Stepped CV on Freq CV 11:10 Stepped CV on Input + Audio rate FM
The CubuSynth VCFA is a multimode VCF with LP,HP and BP modes with integrated VCA, CV control over Frequency, Resonance and Volume.
The CV input for the Frequency features 1V/Oct scaling over about 2~3 octaves. So you can even create plucky melodies with the resonance in "ringing" mode.
The Gain control can reach a nice, soft saturation.
Key features
- 3 simultaneous outputs for Low Pass, Band Pass and High Pass - Integrated VCA on input stage - Input saturation on upper Gain levels - CV control over Volume, Frequency and Resonance - Frequency CV scalable for 1V/oct signals (stable up to 2-3 octaves) - 'ringing' appears on upper Resonance levels
"Dual / Stereo Multimode VCF with Self-oscillating Resonance and intuitive Routing and CV modulation Matrix
The CubuSynth Dual CS-20 VCF is a dual / stereo multimode VCF / Phaser / VCO, inspired by the legendary Korg MS-20, with CV control over frequency and resonance. The resonance can self-oscillate and features a 1V/Oct input, stable over at least 2~3 octaves.
Each of the two filter cores has 2 stages of Low Pass and High Pass filtering, which can be blended.
The Frequency CV can be “attenuverted” (with inverting attenuator on CV input). The resonance CV comes with an attenuator."
Dual / Stereo Multimode VCF with Self-oscillating Resonance and intuitive Routing and CV modulation Matrix
The CubuSynth Dual CS-20 VCF is a dual / stereo multimode VCF / Phaser / VCO, inspired by the legendary Korg MS-20, with CV control over frequency and resonance. The resonance can self-oscillate and features a 1V/Oct input, stable over at least 2~3 octaves. Each of the two filter cores has 2 stages of Low Pass and High Pass filtering, which can be blended. The Frequency CV can be “attenuverted” (with inverting attenuator on CV input). The resonance CV comes with an attenuator.
Key features - 2 individual Filter cores with common Frequency and Resonance controls - CV control over Frequency and Resonance for each Filter core - self-oscillating Resonance with LED feedback circuit (visible on the Front) - 1 V/oct input, tracking over 2~3 octaves - Frequency Range: 22 Hz – 20 kHz - Blend between LP / HP Filter modes - Ability to use as 2 pole (12db) stereo HP/LP Filter, 4 pole (24db) mono LP/HP or a Band Pass (12db) Filter - Cross FM Modulation possible
"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.
Video timestamps:
00:00 Intro & Waveforms
01:57 Skew function
02:42 Frequency Multiplier
03:07 CV Inputs
04:33 Outputs
05:10 Step mode & Sync Input
06:00 Jam with external sequence
"The CubuSynth VCLFO v2 is a Complex voltage controlled Low frequency oscillator, with 16 Waveforms, Step control (Sample&Hold style), LFO Sync / Reset, CV control over Frequency, Amplitude, Waveform, Frequency multiplier, Skew and Step Rate.
• 16 Waveforms selectable in two Banks of 8
• Frequency range: 0.05Hz to 12.8Hz (102.4Hz with multiplier x8)
• 6 CV inputs for Multiplier, Frequency, Step Rate, Skew, Waveform and Level
• "Sync" Input for LFO reset, or Step Sync
• 3 outputs:
Uni-Polar (0 to +5V),
Bi-Polar inverted (+5V to 5V / 10Vpp) and
Bi-Polar normal ( 5V to +5V / 10Vpp)"
"The 4VCLFO is four LFOs with triangle Outputs in 10hp. It features a knob for the Frequency of each LFO and CV inputs with attenuators.
The 'Aux' input is normalized to the four CV inputs, so you can modulate all LFOs with one signal at the same time. Plugging a cable into the CV input breaks its connection from the aux input.
This way you can create more interesting Modulations for your Patches.
- Modulation routing in this video:
LFO 1 modulates Filter Cutoff frequency
LFO 2 modulates VCO wavefolding
LFO 3 modulates Pitch of VCO (01:00-01:20) and Aux CV (from 1:50)
LFO 4 modulates Release/Decay Time of ADSR"
The 4VCLFO is four LFOs with triangle Outputs in 10hp. It features a knob for the Frequency of each LFO and CV inputs with attenuators.
The „Aux“ input is normalized to the four CV inputs, so you can modulate all LFOs with one signal at the same time. Plugging a cable into the CV input breaks its connection from the aux input.
This way you can create more interesting Modulations for your Patches.
Create your own Analog VCO on our Eurorack ProtoBoards. Based on the AS3340 chip / Data sheet circuit
Background music made with CubuSynth Modules."
"Prototype PCBs for Professional looking Eurorack DIY projects.
Create your own Eurorack Modules from your Ideas faster than ever with our high quality PCBs and Aluminium Front panels.
The Main PCB is used To place and connect the ICs, Power connector and other components, while the Control Board is used for Potentiometers, Switches, Jacks and more. The Aluminium Front Panels have markings on the Back, making it easy to drill your own layout.
You can easily build passive modules with only a control PCB and Front Panel.
The Layout of the Control PCBs can support Vertical Potentiometers (RK09....)or Tall Trimmers, Mini Toggle switches, 3.5mm PJ-301 Jacks (Thonkiconns) and more.
4 hp Module Set: Main PCB + 4HP Control PCB + 4HP Panel
10 hp Module Set: Main PCB + 10HP Control PCB + 10HP Panel"
Been working on this for a while and it's finally at a point where I want to share it.
*Tresse* is a standalone polyphonic synthesizer built around Mutable Instruments' Plaits DSP code, running on an ESP32-S3 with a custom PCB. Three voices of polyphony, 38 synthesis engines, USB, DIN/TRS and Bluetooth MIDI, and perhaps Ableton Link and our upcoming stack (VMB) Våld Modular Bus, expected to ship this summer, and which will a new wireless comms protocol with negligible latency, auto discovery and machine mesh capabilities (to be released soon). Also enough knobs and encoders to actually play the thing without menu-diving, and a battery for when you're bored outside of your studio.
*The core idea:* take the full Plaits engine library — all 24 algorithms — and make it polyphonic in a self-contained hardware instrument. Then keep going and add 14 more custom engines on top. There are hundreds of options similar to this in modular systems and i thought why not bring all these god-level creative tools to bedroom, desktop producers who don't have the money or the space (or will) to mingle in the modular space, and bring them one contained box with all they need.
What's inside
*ESP32-S3* doing all the DSP across both cores (voices 0+1 on Core 1, voice 2 on Core 0, parallel render) **PCM5102A DAC**, 24-bit output, 32kHz sample rate *4 pots + 4 rotary encoders* through CD74HC4067 mux and MCP23017 I2C expander *OLED display* (128×64) for patch info, engine select, preset browsing *USB MIDI + BLE MIDI* — works with everything, no adapter needed for wireless Custom PCB, all through-hole friendly
38 engines
The first 24 are straight from Plaits — East Coast, Phase Distortion, all three DX7 variants, Terrain, String/Chords, Chiptune, Wavetable, Speech, Swarm, Particle, the Rings modes, the three drum engines, etc.
Then 14 custom engines built from scratch:
*Karplus-Strong* — proper physical string modeling with excitation morphing (noise → impulse → tonal) *ByteBeat* — 8 classic formulas with pitch-tracked rate, gets wild *CZ Phase Distortion* — Casio CZ-style, three distortion shapes *Supersaw* — up to 7 detuned saws with PWM, the obvious one but it needed to exist *Formant* — vowel synthesis with 3 bandpass resonators, gender shift control *2-Op FM* — clean FM with 13 ratios and operator feedback *Wavefolder* — sine/tri/saw/square source into a proper folder with bias *Noise Drums* — SVF-based with pitch envelope, covers kicks through metallic hits *Modal Resonator* — 8 tuned bandpass partials, morphs from harmonic → bell → bar inharmonicity, with a bowed excitation mode *Sympathetic Strings* — 3 coupled Karplus delay lines with controllable coupling and interval ratios *Comb Resonator* — 4 parallel comb filters with spread control *Drawbars* — organ-style additive with 8 Hammond-ratio partials *Complex Oscillator* — FM into wavefolder, Buchla-adjacent territory *Grain Noise* — granular noise with smoothing, good for textures and pads
Controls
Three parameter layers accessible via toggle buttons:
*Normal* — Timbre, Morph, Harmonics, Color on pots; Attack, Decay, FM, LFO Depth on encoders *MOD* — Fold, Detune, Ring Mod, Chorus on pots; LFO destination/shape/speed/sync on encoders *SHIFT* — Filter Cutoff/Reso/Env/Type on pots; Portamento, Octave, Vibrato depth/speed on encoders
Hold both buttons → engine select overlay. Double-tap MOD → system menu (randomizer, MIDI config, play mode). Double-tap SHIFT → preset browser across three banks (own patches, generated, branches).
Play modes: Poly, Mono, and chord modes (Major, Minor, 7th, Sus4, Power, Octave).
The randomizer is one of my favorite things — it generates random patches with procedural names (stuff like "Velvet Moth" or "Iron Shard"), you scroll through them with the encoder, and save the ones you like to a generated preset bank. 512 slots each for generated and branch presets, 128 for your own.
What it sounds like
Honestly covers a lot of ground. The Plaits engines already span everything from classic analog to FM to physical modeling to noise, and the custom engines fill in some gaps I wanted — proper supersaw, real Karplus-Strong, the modal/sympathetic stuff for metallic and evolving tones, and the ByteBeat engine for when you want to go full chaos. The global FX chain (filter, wavefolder, ring mod, chorus) ties everything together.
The project should be available from April 2026, in kit or assembled units! Price to be discolsed once i have the final FINAL prototype, but shouldn't hurt the wallet.
This is a *Våld Labs* project from Lisbon Portugal. Much more to come.
Would love to hear what people think, and happy to answer questions about the build or the DSP. Be aware that this is a pretty advenced prototype, but still a prototype"
"Demonstration of some of the Capabilities of the ARKARION Synthesizer in form of musical Examples.
The ARKARION is controlled via MIDI Interface, melodies created in the DAW.
Only raw Sounds were recorded straight from the Output from the ARKARION without any processing. In some examples, two recordings are layered together.
Drums were made in a DAW. For Psytrance example, Drums and Bass come from the DAW.
00:00 Example 1 (DnB)
04:06 Example 2 (Melodic Techno)
07:15 Example 3 (Proggy)
09:35 Example 4 (Psytrance)
11:35 Example 5 (House)"
"The 4 Cubed collection was designed to cover some of the most needed functions for eurorack in a small and easy to DIY format. It features Clock generation with probability, Decay envelopes, VCAs and Mixing.
• 4hp / 4channels each • Essential tools for every eurorack system
4TRG - Quad channel Probability Gate Skipper • Size: 4 HP / 20 mm • Depth: 24 mm (measured from the front panel) • Current Draw: +12V: +40 mA -12V: -30 mA
4Decay - Quad Analog Decay Envelope Generator • Size: 4 HP / 20 mm • Depth: 24 mm (measured from the front panel) • Current Draw: +12V: +24 mA -12V: -0 mA
4VCA - Quad Audio/CV Analog Voltage controlled Amplifier • Size: 4 HP / 20 mm • Depth: 24 mm (measured from the front panel) • Current Draw: +12V: +20 mA -12V: -24 mA
4Mix - Four channel Audio/CV Mixer • Size: 4 HP / 20 mm • Depth: 24 mm (measured from the front panel) • Current Draw: +12V: +3 mA -12V: -3 mA"
