Commento ufficiale

In rekordbox, pressing SYNC again disables it; SHIFT+SYNC is to toggle which deck is selected as MASTER.
In Serato DJ Pro, pressing SYNC snaps the grid, SHIFT+SYNC wil toggle SYNC OFF; it shows grey when it's disabled.
If this is not working for you, please ensure that you have the latest firmware on your mixer and updated version of the DJ software.