I’m going to lay bare my general naiveté when it comes to DIY electronics…
In preparation for receiving a norns this week, I wish to set up a system for sending MIDI from norns to my Elektron Analog Keys, which can output that data as control voltage to my Buchla (which does not have a MIDI/CV decoder module). The AKeys can be set to provide Buchla-friendly 1.2v/oct and 10v gates, but the Buchla should also NEVER receive negative voltages on any of its inputs and, apparently, the AKeys is capable of bipolar CV output. This is where my question comes in:
I have built a breakout box which takes the TRS signals from the AKeys and splits those into isolated pairs of banana jacks, along with the required common ground jack (see photo below). Following advice, I have used schottky diodes (1N5817) to wire the plugs which should remove all negative voltages.
Before I hook things up and make a costly mistake, I would like to test for pass-thorough of any negative voltages. I have a cheap-o multimeter on hand (photo), which does not seem to give a negative voltage reading from either the breakout box, or testing a TRS cable attached to the AKeys CV outs and sending low octave notes. Could someone recommend the best method for safely testing this breakout box once and for all?