Virtual DJ Conclusive Test - DVS at Quartz Lock Behaviour - Issues 

I had this exact same issue with VirtualDJ DVS. I couldn't solve it and ended up migrating to Serato. I'm glad it's not just me.

Reinventing the wheel 😂😂😂

Recording ANYTHING off vinyl is never going to give you a steady grid. The platter might be turning at a perfectly constant speed during recording, but the physical properties of vinyl cause so many variables. The record is thicker in places and thinner in others. The 33/45 difference is not insignificant, you're running the needle over two difference physical mediums at different RPMs. It really doesn't prove any VDJ issues at all, it just highlights the issues with using vinyl rips.

The quickest way to absolutely rule out it being the TTs is to swap round the channels into the mixer and see if the one previously leading the other, starts to lag behind it. Also, see if it does it with a track you didn’t rip from vinyl, try swapping TT platters, swapping needles, make sure the needle weight is identical, lots of those A/B tests 1 at a time and keep notes of which affected things and how. I do know that on Traktor for example, there’s two different DVS modes, relative and absolute, and in at least one of those, if you were already playing a digital track at, say, +1% pitch, then immediately took over control with a DVS record that was playing at 0% pitch, the track will keep playing at +1%, it’s doing an interpolation between TT pitch and the pitch the software deck was set to beforehand, which might read 0.0 but is actually slightly off 0%. The reason to also test it with non vinyl rips, is because it’s possible you ripped a track when the TT hadn’t warmed up, or was more warmed up than when you tried to play it back with DVS. In my experience it’s pretty much impossible to get anywhere near perfect results, even on quartz lock the DVS pitch fluctuates ever so slightly above and below 0%, giving an average of 0%, but it may not always average to exactly 0% on every single playback, and a needle being dragged over a tune on vinyl will have a different amount of drag than the same needle being dragged over a DVS vinyl.

Try borrowing a 3rd 1200 from a colleague and experiment by alternating between the 3. That experiment could help eliminate any of your 1200's as the source of your problem or it may point to one of your 1200's as the problem.

Virtual DJ makes a tiny Time-Shift in the last Quarter of 4 beats. its a bug in the program. You can never get 2 identical copy's using Virtual DJ software !!!

That much drift is nearly impossible in absolute mode if everything is working correctly. Do you have doubles (exact same pressing) of any record? If you do, try playing them together on beat from the beginning. If you get drift too soon you have a problem with one of your decks.

Have you had your turntables serviced? The pitch control on both turntables won't be identical, there might be a slight difference in speed, which you won't notice by looking at the dots on the platter. Plus there is a different in 45 & 33rpm...

Its just a calibration issue bro! It wouldn't stop you from manually keeping it in-the-mix if you were doing a live gig! Would it? Peace✌

you'll never get good measurements using tracks ... use the tools you have available eg. the serato noise map ... or get a record with a 1khz tone on it ... record that, and listen back to it from the vinyl and the recorded track... It's much easier to judge the difference with pure tones

Not a fan of cleaning, yeah? Making my eye twitch seeing all that dirt and filth around your equipment.

Nobody cares