Macumbista Benjolin Circuit-Bent Noise Synthesizer Rob Hordijk Design

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"The Benjolin is a standalone synthesizer designed by Rob Hordijk from the Netherlands. It contains two oscillators (one LFO and one VCO), a voltage controlled filter and a circuit called a “Rungler”, which allows chaotic cross-modulation possibilities between the different parts of the circuit. Hordijk refers to the Benjolin as a circuit which has been “bent by design.”

These hand-made Macumbista Benjolins have been further customized with a patchbay, which can be used to interface with other modular synthesizers or to setup further control voltage feedback systems within the Benjolin itself, attenuators on the three control voltage input and LEDs displaying the internal state of the Rungler. This particular Benjolin has BLUE CV/audio output banana jacks and YELLOW CV input banana jacks. The BLACK banana jack is wired through the volume knob to a 6.33mm (1/4") Neutrik output jack on the back.

You can watch a short demo of two of these Benjolins in action here: http://vimeo.com/70111383 [posted here]

The patchbay of these Benjolins has banana jack connections for the square and triangle waveforms of each of the two oscillators, the Pulse Width Modulation output of the two oscillators, the Rungler output, the XOR (exclusive/or) logic operation of the two oscillators and the output of the filter.

There are also banana jack control voltage inputs with attenuators for the frequency of each of the two oscillators and the filter cutoff frequency. The layout of the panel is designed to be both intuitive and playable (unlike many EuroRack modules, for example…). And finally, the three output bits of the Rungler have been visualized with red, green and blue LEDs.

All Benjolins use a Neutrik 6.3mm (1/4″) output jack, an additional GROUND banana jack to interface with other modular systems and a 12 VAC “wall wart” power supply (mainland European and North American versions available).

I have been personally producing these hand-crafted Benjolins for the last two years under licensed agreement with Rob Hordijk. You can see more about them on my website.

You can find more detailed information about the Benjolin, and about the Rungler function in particular, here."