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click on the schematic for a larger version.
<a href="http://casperelectronics.com/wp-content/uploads/Benjolinmodularization.jpg"><img class="alignnone size-large wp-image-2048" alt="Benjolinmodularization" src="http://casperelectronics.com/wp-content/uploads/Benjolinmodularization-460x276.jpg" width="460" height="276" /></a>
Adding inputs to the Benjolin is easy. Each input that <em>can</em> receive a CV or audio signal already has a mixer built in. Adding more inputs is simply a matter of adding a jack and a resistor (and a capacitor in the case of audio inputs). It’s also a good idea to add input level potentiometers. I've found that two inputs with level adjustments per CV in is a good number.