There are two translators, one for up and one for down.
I have note-on note 0 MIDI CH 1 set for up and note-on note 1 MIDI CH 1 set for down
For up we increment the value of ga. For down we decrement the value of ga. The rules do not allow to go beyond 127 up or 0 down. We use the value of gb for the outgoing CC number for each translator.
My aliases are set up as follows. You will need to set them up for your device and whichever port RekordBox is monitoring.
You can learn more about aliases from this tutorial.
Here the rules for up.
gb=16
// skip amount
pp=3
ga=ga+pp
if ga>127 then ga=127
Log "Log Up"
And the rules for down
// skip amount
pp=3
ga=ga-pp
if ga<0 then ga=0
Log "Log Down"