Hi. I come from Serato and have used Rekordbox DJ (4.2.4) four times in club gigs. All in all, the software is great, but one problem keeps haunting me.
I use DJM-2000 as a soundcard and 2x CDJ-2000 as controllers in HID, computer is a Macbook Pro. In every gig (5 hours long) following happens. For some reason at some point the master deck is not switching to the playing deck and because of that no quantization is happening. And that problem can go away just like it appeared.
In detail... yesterday I played for an hour, everything was fine. The master deck changed to playing deck like it should. Then all of a sudden not anymore. For example, left deck (deck 1) was playing, I mixed in the track from the right deck (deck 2), after the mix I stopped the left deck (hitting CUE), and the master deck didn't switch to right deck. So the master stayed active on the left deck. If that problem appeared quantize didn't work anymore also. For example, when I press play the beat didn't snap to grid. If I changed the master deck to right manually quantize didn't work also.
What's strange is that this (master deck not switching) can go on for half an hour or an hour and then all of a sudden everything works fine. Master deck changes like it should. I can't figure this out. All this scenario above happened to me yesterday 3 times. Where is the problem? All my tracks are analyzed and beatgridded in Rekordbox DJ.