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"Here are the technical details:
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.”The double version, which I have named the Butterfly Benjolin, allows incredible amounts of chaotic cross-modulation between the two halves of the instrument.
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.
FEATURES
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 two Neutrik 6.3mm (1/4″) output jacks, 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).
These Benjolins are produced under licensed agreement with Rob Hordijk.
PRICE
The price of the Butterfly Benjolin is EUR 1065 (incl. 19% EU VAT) / EUR 895 (shipped outside the EU) plus shipping. All my instruments are made-to-order, with approx 1-2 month waiting time, and require a 50% deposit to being work.
Please contact me using the CONTACT page here, or through MACUMBISTA at-the-domain GMAIL dot COM. Thank you for your kind attention.
MODIFICATIONS
The Butterfly Benjolin V2 differs from the first Butterfly Benjolin, and contains the following modifications as standard on each half of the instrument:
LOOP SWITCH: The LOOP switch locks the otherwise chaotic pattern of the Rungler into a loop. The UP position is a loop of 4 steps going forward, the MIDDLE position is the normal chaos of the Rungler, and the DOWN position is a loop of 4 steps forwards and 4 steps backwards.
EXTERNAL INPUT SWITCH: The external input 6.3mm jack on the back of this Benjolin allows a signal from another source to be sent through the Low Pass Filter of the instrument. Selecting “EXT” on the FIL INPUT switch sends this signal to the FIL input, where the cutoff and resonance controls of the filter can be used to affect it. When the FIL INPUT switch is in the “INT” position, the PWM signal, mixed with a small amount of RUN voltage, is sent to the FIL (this is the normal Benjolin signal path).
EXTERNAL RUNGLER CLOCK: A jack of your choice (banana, mini-jack or 6.3mm jack) on the back panel of the instrument provides a switchable clock source for the Rungler of the instrument. The DOWN switch position clocks the Rungler from OSCILLATOR 2 of the instrument, the UP switch position clocks it from the external clock input."
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