Macumbista Butterfly Benjolin analog modular synth

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via this auction

"The Benjolin is a synthesizer designed by Rob Hordijk. It featrues two oscillators, a low pass filter and a random circuit of Rob's own design called a Rungler that outputs voltages, somewhat similar to a sample and hold circuit.

The Macumbista Benjolin is hand-built by Derek Holzer from Rob's circuit design. The Butterfly Benjolin you see here is actually TWO Benjolins together in one box. They are patchable via banana jacks. The cross modulation possibilities are endless.

This one is from 2014. Has the (discontinued) hand-stamped faceplate. Mine also has a mix output that uses the volume controls to blend both of the Benjolins and send out via a single 1/4 output. Very handy for showing up and plugging into an amp. Still has the standard single outs for each Benjolin as well. Comes with 6 banana cables.

I've taken very good care of it. No issues. Being a handmade instrument, it isn't perfect, but that's part of the charm."

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Catjar in the Rye

"'Catjar in the Rye' (or 'Betty', as she is know to her friends) is an experimental sound instrument built for Swedish composer Andreas Catjar. It combines a chaotic Benjolin synthesizer, extreme fuzz distortion unit, a speaker/ contact-mic feedback system and 'circuit-bending' -style body contacts into one rugged flightcase. The Benjolin features several modifications, including patchable routing banana jacks, LED lights for the three stages of its analog shift register and an external audio input. I hope to post some sounds and video later on, when Andreas has time to make them.

My thanks go out to Rob Hordijk, who designed the Benjolin circuit, and to Pete Edwards/Casper Electronics for his help in working out the modifications..."

You'll find the full post including more pics at macumbista.net here.

SoundBoxes Workshop Berlin with DEREK HOLZER

via macumbista.net

"May 26 & 27, 2012, Time 11-19
Presentation Sunday May 27 2012, Time 20.00 (venue TBA)

Discover the hidden sonic qualities of objects from our everyday world in this workshop, combining the arts of electronics, noise, sculpture and collage. The basic elements we will employ are a wooden box, a speaker, a small audio amplifier, and a contact microphone. To this, brave box-builders will add their own found objects, graphics, images, memories and ideas to create a unique electroacoustic cabinet of curiosities.

No previous electronics experience is necessary for this workshop."

Full details at the link above.