I purchased Rekordbox DVS with Interface 2 package.
With music playing from Rekordbox through the Interface 2 when I open Playlists, scroll in Rekordbox or drag tracks around in the user interface I can hearing loud crackling sounds coming through the Interface 2.
I do not have this problem with either Traktor or Serato.
Rekordbox version: 4.5.0. Interface driver: 1.0 (6 July 2017) for Mac OSX Sierra
Connected to a 2016 MacBookPro with Intel Core i5 / 16GB RAM / SSD running MacOS Sierra 10.12.6 (16G29).
It seems that the Interface 2 is allowing the noise of reads from the SSD on the MacBook to be audible.
I have already logged this with Pioneer support and I am overdue a response.