The Fancyyyyy K-Accumulator - A Complex Oscillator Made of Complex Oscillators 👽

K-ACCUMULATOR - 21st Century Complex Oscillator video upload by Fancyyyyy Synthesis

Note, this appears to be the first Fancyyyyy post on the site. :)

Currently exclusive to Perfect Circuit

"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."

Available at Perfect Circuit

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Exploring clocks, loops and chaos with Rung Divisions from Fancyyyyy Synthesis

video upload by Tom Churchill

"This video is about Rung Divisions, by Fancyyyyy Synthesis. It’s one of the most inspiring modules I’ve used recently, but it’s also quite a hard one to sum up in one sentence.

It has two main components. The first is a clock divider which outputs pulses that you can combine in two buses to create polyrhythmic patterns. That drives a universal shift register which outputs pseudo-random, chaotic or looping stepped voltage patterns. It’s an evolution of Rob Hordijk’s Rungler circuit, which is at the heart of the Benjolin synth. And there are dozens of interesting musical applications for it - a few of which I explore here.

Find out more at https://www.fancysynthesis.net/

NB: Fancyyyyy Synthesis sent me this unit to check out, but I don’t get any other sort of payment. This is a demo, not a review, and this channel is a hobby, not a job, so I only showcase things that I’m genuinely enthused about.

More stuff from me:
https://tomchurchill.bandcamp.com/
https://soundcloud.com/tomchurchill
https://www.instagram.com/tomchurchill/

Chapters:
00:00 Intro and patch previews
02:46 Rung Divisions overview
05:54 Drum trigger sequencing
09:54 Melodies from pulse divisions
14:14 Shift register sequencing
20:15 2-channel pitch sequencing
24:00 Patching a voltage-controlled clock divider
27:42 Shift register as a VCO
30:22 Rungling for chaotic sequencing"

​Rung Divisions combines a universal shift register, a “divide by n” pulse divider, analogue noise, and several logic and binary operations. These functions synthesise an array of predictable and unpredictable digital signals at arbitrary time scale.

Rung Divisions’ primary use is as a complex polyrhythmic gate generator that drives a chaotic / pseudo random / looping stepped cv pattern generator, with voltage control over the pattern “direction”, length, and chance of the pattern looping. The combination of these features can be used to generate auditory illusions similar to a stroboscopic effect – like the visual aliasing of a wheel that appears to stand still and reverse direction at speed. Rung Divisions is built with solid state & discrete logic blocks to work at frequencies between 0–40kHz. The module is designed to drive multiple voices with gate patterns and CV, or to generate audio rate mayhem - these functions can be combined through patching with other modules that can take input signals over a wide frequency range. ​

Rung Divisions behaves in many surprising ways with feedback and self patching - the module has propagation delay compensation to allow for all outputs to be used in feedback loops.

Polyrhythmic Clock Divider
Random / Looping Sequencer
Chaotic Stepped Signal Generator
​​
12hp
35mm deep
+12V 58mA
-12V 42mA
​
Complete redesign of the 2018 module, building on the original features in multiple ways:
Universal shift register - can shift data in two directions​
Dual gate bus with three position switches
CV over pattern length, shift direction and chance of loop
Analogue noise output
Clock pulse width affects all outputs
1-bit, 3-bit and 8-bit data encodings
All solid state and discrete logic, runs at wide bandwidth
Expander ports for upcoming dual oscillator, cv addressable clock divider, bit sieve and random voltage sources