A quick vid by request. Pitch tracking is quite a bit more complicated and would require some know how and soldering skill. Diagram of circuit: Required for my converter box: - 10k resistor - 2N3904 transistor - 40x20x11mm Junction Box (for the enclosure, this one actually has perfect holes ) - 2 jacks (stereo or mono as you're only soldering one lead). Then simply forget the PCB and solder the wires/resistor
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