Make a Benjolin Modular Synth
The Benjolin is a ‘noise box’ that is ‘bent by design’, meaning that it always has a definite amount of unpredictability while it is still intuitive to play. The Benjolin features two eighteen-octave range voltage controlled oscillators that drive a ‘rungler’ circuit, circuitry that in essence uses a special interference technique feeding back into the oscillators to force them into wild chaotic behaviour. A special slightly chaotic filter is both excited and modulated by the signals from the rungler circuitry processes, producing sounds between fat drones to grungy noise havoc.
This is a somewhat challenging build, which is why we schedule it over two sessions (it's possible to finish in one with some perserverance). It is all through-hole parts and once you've soldered all hundred-odd parts you'll be practically a pro. Everyone is guaranteed to leave with a working synth.
This module fits in the Eurorack grid, or you can power it with 2 9V batteries. It is comparable to some commercial versions such as the Epoch Modular Benjolin There's also a software version in Pure Data for your enjoyment.
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