>>If I were you, I'd stick in ∗in the Korg∗ !!<<
When the zener diode in a cable was first mentioned, the person who inquired
about this sounded as if he didn't trust the diode method. Why not just tie
two like resistors together in series , solder one end to ground, one end to
the incoming gate signal, and tap off the middle for the modified gate. That
could be put in the cable to knock the gate down by half or whatever ratio
you choose.
-Elhardt