I've just built this Befaco Even VCO from a kit and here's a quick look at the features and a nice long bit of music making. Check out my Modular DIY video for the whole story of the build. The Even VCO is the only sound source using the Sine, Pulse and Even outputs. Other modules include the Jove and Polivoks filters, Magneto, Maths, Edgecutter and the Turing machine is generating the sequence.