If I understand this correctly, direct currents which are straight lines and the kind of current that knobs output, as in a knob at "10" outputing a steady 5V voltage, is probably similar to Keyboard voltage output, which is like a quantized knob that outputs discrete voltage amounts, right? So, keyboard Voltage is DC also, right?
I know on an oscillator module, or filter module, you can input DC keyboard voltage or
AC LFO voltage (for instance). So, isn't it true that AC and DC currents are interchangeable on all synthesizers? Not just on the Serge? Or am I getting confused about things again.
I think I've got it now. I don't know of a situation where it would be neccesary for me to consider these principles or to distinguish between AC and DC when using the synthesizer. But I like to have a better idea of what's going behind the controls.