If VDJ is your reference system then you should be aware that Atomix also have “jumped on the bandwagon” by offering Rekordbox compatibility. They have made themselves compatible with a direct competitor - which you say is bad. 
OK they don’t call it OneLibrary, but it is - in all but name.
formatting the drive every time is insane especially with 10K or more on 2 drives, main drive and backup drive and if you but an internal drive for the Rane S1 with the sole purpose of dumping your entire library on there then you can never make changes deleting tracks on your laptop playlists and then later plug in the S1 to update that drive cause it puts all the tracks back in the playlist, dumb!
2nd it has nothing to do with doing it right the first time, it has to do with playlists you edit based on what you use and dont use, for example some people may have a “top 40” playlists, after a few months or a year you would go in and remove some of the tracks and update with newer “top 40”, then you plug in the drives and it just puts all those deleted tracks back in to the playlist
They don’t call it “One Library,” and that’s not what it is.
VDJ can read RB xml data, and VDJ can write to CDJ USB drives. Unofficially, as far as I know. Is that what you meant… or since when has VDJ been able to write in the “One Library” format? Maybe I missed something there.
I seem to recall seeing on the VDJ forum that this topic was dismissed pretty quickly over there. However, I am certainly open to being convinced otherwise.
I’ve been using VDJ since the Atomix days. I was one of the first people to use it in a club (in Ratingen)—back then, I used a controller from American DJ that had been imported from the USA. I can’t remember the exact model anymore. It was quite similar to the Denon 2600F.
Yes, I know VDJ well. If you have any further insights, I’d be happy to read about them.
whether you manually organize OR use sync manager, the same issue appears
yes you can make these changes with the flash drive plugged in but then when you connet the backup drive or the RS1 internal drive, the deleted tracks are once again added back in
so if you only update the internal Rane S1 drive every few months because its just a backup, it can mess up all updates of removing and adding new tracks in top 40, club and so playlists
I just provided my workflow for managing my library.
You’re free to do with it whatever you want. An old saying “one mans insanity is another mans genius”.
You do you chief.
i appreciate the info but the fact that Denon thinks people should format their drives every time they make a change to their library is insane. lol
and yes, as you know, libraries change a lot in mobile DJ world when you’re doing different style events every weekend and setup the playlists based on the event for intros, specialty dances and so on
If you have your library on external drive, don’t even open engine dj without that drive. That engine dj doesn’t make a different library elsewhere, when does not see that particular one (main). This is a basic rookie mistake when running any data base…
huh? my main library is all internal on a 2TB macbook, No rookie stuff going on, been using RB syncing with flash drives for 10-15 years with no issues at all.
I dont work for Denon, im just a user like you, nobody from InMusic has ever said or implied that as far as im aware.
i know, was just shocked this is not something thats fixed or changed by now
I treat my drives the same way i treat my photography SD cards, i do regular formatting to keep them clean. I tie this in with any changes i make to the DB so im doing a fresh library install to ensure there is no issues with tracks showing as red when i turn my device on, and also to keep the library DB on the device as clean and uncluttered as possible.
People rag on Engine Desktop all the time but my humble opinion Rekordbox is far more annoying to work with. there are countless popup windows when you launch it, then you cant simply drag and drop folders into your library as 2 more popups appear asking if you want to skip or add existing tracks (if you select the wrong option you end up with duplicates which can create a right mess). You then have to use their incredibly slow sync manager and then the final annoyance, if you dont right click on the drive and select ‘update library’ before ejecting, none of the new music you added will be visible when you get to the gig. That to me is far far more annoying than anything Engine Desktop does, in fact its infuriating.
InMusic probably havent accounted for people making continual changes to their library, as most people will put their music in a playlist and leave it there.
I can see you created a feature request to have this behaviour changed, but so far it has no votes, not that votes mean much. The main thing is the devs can see the request and like most other things it will be considered , just dont expect the change to be made, as nothing is nailed on to be changed, even the most popular requests.
sounds good, let’s see what the future holds!!
The OneLibrary format as you call it is just another name for Rekordbox format. It’s not a new standard. It’s just renamed.
Is a post from Atomix CEO Stephane Clavel in February (Thursday 19th) evidence enough for you?
“One Library was implemented in VDJ many years ago. Long before Pioneer 
(except we named it “CDJ Export”, but that’s really exactly the same thing as One Library).”
VDJ can import Rekordbox XML files and write individual CDJ export playlists to a USB stick—but that is something entirely different from officially being part of the OneLibrary ecosystem or utilizing its native data model.
The statement in the VDJ forum was quite obviously intended to mean: “Technically speaking, we have long been capable of processing the underlying concept.” It was by no means intended as an official confirmation that: “VDJ is OneLibrary-compatible or part of the system.”
But fine… You’re right… and let’s just leave it at that. You have your interpretation… I have mine… and?
The head honcho at Atomix clearly states that it’s “exactly the same thing” and you claim that he’s not saying it’s compatible? 
It’s exactly the same, but not compatible? Where’s the logic in that?
I give up.
Hello everyone.
I think the problem that many people have with synchronization is because the contents of the USB drive are different from the original structure on the computer’s hard drive.
If I have a folder based structure on the laptop with the music, and from them I create playlists for the software, I don’t see the need for this structure to be altered when transferring playlists to the units (USBs or internal ssd in standalone hardware).
And with this, what I did to solve it is to create my own synchronization tool that transfers the songs, stems, the corresponding soundswitch files to the internal hard drive of Prime 4+ respecting the same structure that the folders on the hard drive have, and altering the target database accordingly with the structure of the laptop.
This works perfectly for me and also enables bidirectional synchronization from Prime4+ to the computer’s hard drive in case of disaster.
First I create a folder on the computer to house the new music.
Then, I open Engine software and create a playlist that will contain the new music that has just arrived. I import the music from the folder into the playlist for analysis. I create the cue points, loops, and so on, and I create the stem files.
Once finished, I add the lighting files with SoundSwitch. Once I finish working with Engine software, I close the program, and open my tool, synchronizing my new playlist with it to the internal Prime4+ hard drive. And that’s it. Everything in place seamlessly. The Prime4+ internal database has the data synced from the PC with the Playlist information I’ve selected to sync.
And the database that works in Prime4+ respects the folder structure that I have decided to have on the computer.
So, I think we don’t need an “one library”, because we already have an open library that allows us to do these things and adapt the system to the needs of the user.
I was dreaming about this! Full controll with touch screen on Traktor Pro! 
Not quite since Algoriddim can’t read a CDJ Export USB from VDJ on iPad, but it can use one exported in OneLibrary
Exported in what format? VDJ offers several export options for compatibility. If djay Pro only reads Device Library Plus and the export was Device Library then that’s the issue.
Pio/AT had this exact issue on their own units, and had to withdraw firmware.
A quote from AlphaTheta’s own FAQ: “full compatibility between different software applications isn’t guaranteed”
Thanks for clearing that up. I will have to test the device library plus export. I tested it shortly after the announcement for OneLibrary. I don’t recall having an option at that time.