Are there any world-first (industry-first) or Pioneer-first functions?

The “Filter Fade” function is a world-first.

This unit is equipped with a “Filter Fade” function allowing tracks to be mixed naturally using the crossfader, by combining the parameters of the left and right decks’ volume and high pass filters. The movement of the crossfader is associated with the high pass filters of the left and right decks, and the volumes of the left and right decks change as the filter is applied to the bass sound, so even tracks of different genres can be mixed smoothly.