https://proaudioaccessories.com Sat, 13 Jun 2026 19:25:50 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 https://proaudioaccessories.com/2022/01/benjolin-eurorack-dual-oscillator-multimode-filter-aleatoric-chaos-module/ https://proaudioaccessories.com/2022/01/benjolin-eurorack-dual-oscillator-multimode-filter-aleatoric-chaos-module/#comments Sun, 30 Jan 2022 01:15:38 +0000 https://proaudioaccessories.com/2022/01/benjolin-eurorack-dual-oscillator-multimode-filter-aleatoric-chaos-module/


The Benjolin is a multifunction synthesizer designed by Rob Hordijk. The module consists of four separate function blocks: two VCOs, a state variable filter and an additional circuit, invented by Hordijk himself, called a rungler. This particular arrangement emerged from Hordijk’s efforts to design a synthesizer that was, as he puts it, “bent by design”. As such, the module functions according to principles of chaos theory, where short to long sputtering patterns spontaneously transform themselves, at times, gradually, at others, quite suddenly, morphing into new pattern doublings and bifurcations. The chaotic character of the Benjolin is anchored in Hordijk’s rungler circuit. In essence, the rungler is an 8-step shift register that takes its data input from one oscillator (OSC A) and its clock input from the other (OSC B). The output of the shift register is then fed into a primitive, digital-to-analogue converter, creating a stepped voltage pattern of variable length and depth, what Hordijk terms a “stepped havoc wave”. This rungler wave is then wired back into the oscillators, via the attenuator knobs (Run A and Run B), creating the complex interference system that lends the Benjolin its unique, aleatoric character. The inclusion of a voltage-controlled filter expands these possibilities further into the audio realm. Its design includes Hordijk’s signature, Z-plane modulation circuitry, which produces all-harmonic distortion. This gives the filter that kind of warm, organic character, reminiscent of classic tube amplifiers. This is most palpable when the resonance of the filter is turned to the maximum, with both oscillators running in the audio range. The filter’s input comprises a mix of a PWM wave (derived from the triangle waves of each oscillator) and the rungler signal itself. As with each of the oscillators, a rungler attenuator (RUN F) allows modulation of the filter as well. To round things out, CV inputs for both the oscillators and filter are normalized, each via their respective attenuators. This allows for cross modulation between the oscillators and a “sweeping” effect for the filter, hitched to Triangle B. NOTE: As with all Benjolins main output is at line level and all other outputs are at modular level. So if you want to further process this in the modular realm something like a preamp module will help (i use one channel of my MI Veils 2020 for this as it has 20db gain). Some people modify the output to be at modular level but then reported problems so I never did any mods and just use an extra module. I usually send the output to my computer for reverb anyway. This item is in the category “Musical Instruments & DJ Equipment\Pro Audio Equipment\Synthesisers & Sound Modules”. The seller is “thorosm” and is located in this country: GB. This item can be shipped to United Kingdom.

• Model: Benjolin
• Analogue/Digital: Analogue
• Input/Output Ports: CV In, CV Out, Gate In, Gate Out, Trig In
• Brand: Eurorack
• Type: Modular Synthesiser

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Nonlinear Circuits Triple Sloths Eurorack Module. Brand new, racked only for testing, hand assembled from high quality components, fully tested. Will also contain nonlinearcircuits stickers. Some info about the module below, will just say, this module is AMAZING, really brings patches to life! 8HP 60 mA +12V. This module contains 3 Sloth chaos circuits. Each one runs at a different rate; Torpor takes approx. 15-30 seconds to travel around 2 strange attractors, Apathy takes 60-90 seconds and Inertia takes 30-40 minutes. There are no controls for Inertia, it does what it wants. The pots for Apathy and Torpor do not specifically alter the frequencies, rather the weight of the outputs. Various settings will cause the signals to spend more time travelling around one strange attractor rather than the other. Apathy and Torpor also have CV inputs. Sometimes the CV signals are injected onto the chaotic signals but depending upon conditions may cause windows of periodicity or voltage jumps. Generally the results are good. The X, Y & Z outputs for each Sloth are taken from different stages of the circuit and are all different to each other, although Z is simply the inverted version of Y. The three Z outputs are also fed into a Difference Rectifier and the results of this are available from the + and – outputs at the bottom of the panel. The Difference Rectifier outputs are (ignoring diode voltage drops). Out + = VApathy +VInertia – VTorpor If greater than 0, otherwise 0. Out – = VApathy +VInertia – VTorpor If less than 0, otherwise 0. This item is in the category “Musical Instruments & DJ Equipment\Pro Audio Equipment\Synthesisers & Sound Modules”. The seller is “lolamadeus” and is located in this country: GB. This item can be shipped to United Kingdom, Antigua and Barbuda, Austria, Belgium, Bulgaria, Croatia, Republic of, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, Korea, South, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei Darussalam, Cayman Islands, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French Guiana, Iceland, Jersey, Jordan, Cambodia, Saint Kitts-Nevis, Saint Lucia, Liechtenstein, Sri Lanka, Macau, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and Caicos Islands, Aruba, Saudi Arabia, South Africa, United Arab Emirates, Ukraine, Chile, Bahamas, Colombia, Costa Rica, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, Trinidad and Tobago, Uruguay, Vietnam, Russian Federation.

• Brand: nonlinearcircuits
• Type: Modular Synthesiser
• Model: Triple Sloth

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