A Wobbulator of My Own - Part 2

So once the Wobbulator unit itself has been constructed and successfully tested, that's only the first step in the larger journey... as discussed in the (previously posted) Wobbulator documentary by Blaire Neil, the device's coils need high power (at least 75 Watts per channel) audio to control the individual deflection coils (H,V, "S" coils). So that means the setup requires at least 3 separately controllable channels of audio power amplification (in my case, I made use of a pair of Sony home entertainment system receivers/amps found on EBay). And you need three sources of audio control. I decided to make use of a software emulation of a Eurorack setup, customized with three channels of oscillators and output gain controls. (The free PD software is "VCV Rack 2".)  These VCV synthesized signals are fed out of my computer via a set of USB audio interfaces (Behringer U-Control units), to the audio power amps, and thence to the Wobbulator coils inputs. Of course, you also need a camera to rescan the Wobbulator's screen. (I found an old Hi8 camcorder on Ebay that does the trick. But there are a lot of video recording possibilities - the only limitation being the ability to manually focus and zoom!)

Below are a couple of examples from my Wobbulator at work in my studio. I have tuned the "H" coil frequency to create accentuated scaliness, and the "S" coil frequency to create the raster wobble.

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