Epoch Modular - Benjolin

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€ 479,00 (including 21% VAT)
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The Benjolin's circuitry is based on Rob Hordijk's well-known Blippoo Box, an unique instrument. It is a chaotic sound generator with 2 VCOs that are played autonomously by the "Rungler", a type of shift register that gets it's signals from the VCOs. A 2-pole filter with lowpass and high pass outputs is integrated in the Benjolin, too.

The Benjolin has a chaotic sound core. It comprises of two VCOs (each with pulse and triangle outputs), a Rungler circuit, a comparator and a multimode filter.
The Rungler is an eight-step shift register deriving it's input signal from one VCO and it's clock signal from the other VCO. A primitive AD-converter (a XOR logic circuit) converts the Rungler's digital outputs to a staircase voltage which plays the VCOs in an aleatoric way. The Rungler can modulate the cutoff frequency as well.
The oscillators' frequencies can be modulated by CVs as well but the CV inputs are also normalized to the triangle output of the other VCO, easily you can cross-modulate the VCOs when nothing is patched. The Cutoff-Frequency os the filter is normalized to the traingle output of VCO B. A comparator takes the triangle waves and compares them, resulting in a pulse wave form.

inputs: CV inputs for frequencies of oscillators 1 and 2 as well as for filter frequency.
outputs: Pulse and triangle waveform outputs of oscillators 1 and 2. XOR output, Comparator PWM output. Direct Rungler output. Filter outputs for low, high and band pass.

3U Eurorack module, 18HP wide, 22mm deep. Current draw: 45mA@+12V and 45mA@-12V

No manual available: website benjolin

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