Roon splits up tracks from some albums. Why?

Well, hello there, Season’s Greetings fellow audio enthusiasts and Roon users.

Really nice forum, I already got some help just by reading the right posts here. Let me start by saying, I’m the sort of person who likes to take a good, hard look at something before shaking its hand. That’s why, when the Black Friday deal came around, I couldn’t resist stepping onto the Roon train for a three-month trial. I always wanted to try out Roon but always (and correctly) thought that “one free week” is just not enough to decide whether the software is for me, in fact, getting to know and setting up Roon on a NAS just to try it out for one week seemed to me too much effort for too little trial time.

My music collection consists of several thousand albums, the largest portion of which is my own ripped CD collection, but there are also a number of high-res files, many of which bought from Qobuz or Chandos or Presto or Hyperion, etc. Most of the music is classical music, film music, but also all kinds of stuff, like Jazz, Rock, Pop, etc. All files are (for legacy reasons) in ALAC format. I try to keep my music meticulously tagged, perhaps it gives me a bit of “Zen”, but it’s a garden where every blade of grass stands in orderly rows, and not a weed to be seen. No “Rachmaninov” on one track and “Rachmaninoff” on another. There is harmony, not just in the music but in the metadata. And there’s a reason for it. These tags have been my ticket to uncomplicated listening, working seamlessly across iTunes, MusicBee, HiFi Cast, USB Audio Player, Bubble UPnP, and beyond. Whatever I use, my collection plays nice with every system it meets, and now I’m here to see if Roon’s vaunted brilliance will tip its hat and shake hands with my careful work—or if I’ll be pulling out the white gloves to smooth things over.

I have already tried several music servers and eventually settled on MinimServer, setup (like now Roon as well) on a QNAP NAS. Whatever I use, my collection plays usually nice with every system it meets, and now I’m here to see if Roon’s vaunted brilliance will tip its hat and shake hands with my careful work - or if I’ll be pulling out the white gloves to smooth things over.

First impressions? Roon’s interface has the charm of a French car cockpit (like Citroen). Sophisticated, engaging, but now and then, it takes a turn so peculiar you have to tilt your head and ask, “Now why’d you go and do it that way?” But hey, it’s got personality, and that counts for something. Setup was really easy, and it integrated my own music collection on my NAS with my music (favorites) on Qobuz, great. How can I view them separately? Ah, yes, have to dig into the settings and filter. OK. What kind of covers are those? Ah, Roon picks its own, here can I change it. Why does it say this in the Metadata? Ah, oh, here can I change that. So I did go through quite a few settings already, and I am getting this thing to work the way I see fit.

I find lots to love, and some what puzzles me, and some what would make me gnaw on my hat if I had a hat. Anyway, I have a few questions for you fine folks, which I have not yet found a satisfying answer to. Would be great if some of you knowledgeable folks could point me into the right direction.

First question:: WHY does Roon split up some of my albums into multiple albums. For the heck of it, I cannot figure out WHY? It is not even that Roon splits along discs within a boxed set, no, it singles out tracks and makes albums out of them. I have some albums that Roon splits up into several albums, simply by splitting off tracks, even though they are all one album, and are seen as one album on any other app or server I use and I want to keep them as one album. I can’t for the heck of it figure out why that is. I’d have thought that Roon doesn’t recognize iTunes “Compilation Tag”, but that’s not so, because other compilations are tagged the same way and correctly show up as only one album.
Now I know I can merge the albums manually within Roon, but I would like to know how this can happen? The albums in question are tagged as “Compilation” in iTunes, have no “Album Artist” Tag, yet some of the tracks (just random tracks really) are listed as separate albums. Other compilations (tagged in the exact same way) are fine.

I have read: https://help.roonlabs.com/portal/en/kb/articles/faq-how-can-i-ensure-multi-disc-sets-and-box-sets-are-identified-properly#Identifying_Multi-Disc_Sets

My albums all (without exception, even if it’s just one disc or a boxed set like all Mahler Symphonies) all include the “Disc X of X” tags correctly implemented, and all tracks of an album are always in one folder. So I already fulfilled the “Roon requirements” for albums, yet still Roon splits some albums. What is going on? (Incidentally, it also combines other albums that are clearly two different ones, such as the two versions of Jeff Wayne’s Musical Version of War of the Worlds, but that’s a different story.) One is called “Jeff Wayne’s Musical Version of War of the Worlds”, the other is called “Jeff Wayne’s Musical Version of War of the Worlds - The New Generation”… perhaps the title is too long?

Second question (lesser importance): Which album art does Roon choose? I have some albums that use for various reasons different covers for some tracks. For example, on an album like the FSM Superman Blue Box, which is an 8-Disc boxed set with the film scores for the first four Superman movies as well as a bunch of additional extra stuff, I have set different covers for the various albums in the boxed set, but the first and last track are set to the “boxed set” cover. That usually works across all devices that the album is listed with the “right” boxed-set album art. But Roon seems to pick a random album art from the album to set as album art. I wonder HOW does Roon select album art? Is it correct that it picks the highest resolution cover art from within the files? What if there are several high-resolution cover art files, how does Roon choose among them? I know individual album art can be set, and I like that Roon is highly configurable. I am just wondering how this thing works.

Best to you all and thanks for reading such a long post by a Newbie. I’ll promise my next posts will be shorter.

Content you’re reporting an issue with

Roon splits up some albums from my collection. You can see it here. “2021 Klangwelt Moderne” is a 2CD compilation of classical and jazz music with pieces by different composers and performers. Roon singles out track 7 of disc 2 and lists that particular track as an “album”. What is going on?

Have you made any edits to this content in Roon?

No, not to this particular content. I did “merge” other albums into one that were split, so I am not asking how that is done, I know that, but what causes it in the first place, I try to get to the core of the issue.

Is the album identified in Roon?

Yes.

Is this content from local files, TIDAL, or Qobuz?

All local files.

Screenshot of import settings

Are these compilation albums, i.e. the Album Artist shows as “Various Artists”? If so there’s a known bug here. See:

I think you know that you can use the Merge function in Roon to herd stray tracks into a single album:

The Jeff Wayne releases I think have a chequered history in Roon - I think that this has come up before; a search in the forum will probably reveal the details.

That’s set by the Import Settings (:gear: > Library > Import settings), choose between:

  • Prefer Roon
  • Prefer file
  • Prefer best (i.e. the highest resolution).

For boxsets, Roon doesn’t currently support multiple cover art images (one per disc); it’s been asked for and Roon Labs is supposedly working on improvements to boxset handling, so this may change at some point in the (distant?) future.

Hope this helps.

Looks like your music tags are very messy. Use a program like Tagscanner to tidy them up.

Hi therourke, thanks for your reply. No, my music tags are not at all messy, quite the contrary, as I said, they are tagged very consistently throughout thousands of albums (mostly classical music). They work across a lot of various players and music servers, so they can’t be all bad. :slight_smile:

Hi Geoff,

Thank you very much for your reply.

I see, so that is still an issue in Roon? Yes, these are compilation albums, though SOME compilation albums remain as one album, and SOME compilation albums are splitting. There is no obvious difference between the way these are tagged, which is why I find this odd. But thanks.

I didn’t know that about the Jeff Wayne album, interesting. These are obviously two different albums, though by (some of) the same people and with a similar title.
Anyway, yes, I know you can merge these “stray” albums back into the herd, but I am puzzled as to why they are split up in the first place.

Sure, this helps a lot. Thanks you very much for taking the time to reply. I just wondered if I chose “prefer file”, WHICH image file does Roon use when there is a boxed set where the albums/discs have individual cover art. I’m just wondering how Roon then selects from the multitude of album covers. Most Servers just pick the cover from the first file, Roon seems to have a different logic.

It may be that your metadata for the Jeff Wayne albums is confusing Roon when it tries to identify the release from the metadata. Roon knows about 5 different versions:

But it also thinks there are 3 different versions of the main album, all of which have a different number of tracks(!)…

Re the boxset cover art, personally I use the second method recommended by Roon Labs in that help article, i.e. I have a main folder corresponding to the boxset, with subfolders labelled CD1, CD2, CD3… CDnn for each disc in the set, with the relevant tracks from each disc in their respective folder. Then the boxset cover art is only in the main folder - ensuring that this is what Roon picks.

It’s a bug that has existed for the better part of the year or so, but there is hopefully now a fix in Early Access testing

Yes, it’s seemingly random and which ones are split or OK changes over time. It has nothing (or only non obvious things) to do with your tags. Hopefully the EA fix will take care of it

Thanks, Suedkiez! Now I know it’s not me, it’s just erratic behavior. I doubt they literally inserted a randomizer just for the fun of it and to annoy people, but it sure isn’t obvious why some albums are split and some others are not. :slight_smile:

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Yeah, I’ve got two versions, which are tagged similarly but no the same.

Tags of the original albums are:
Album: Jeff Wayne’s Musical Version of War of the Worlds
Album Artist: Jeff Wayne
Artists: (Whoever is performing the track)

Tags of the newer album are:
Album: Jeff Wayne’s Musical Version of War of the Worlds - The New Generation
Album Artist: Jeff Wayne
Artists: (Whoever is performing the track)

On a forum like this, there are probably many people who have their own systems and feel passionate about how they organize their music and why they do it a certain way. I can understand that for a software like Roon to accomodate all of that is quite tricky.

Personally, I generally have one folder per album, with disc and track numbers given.
So tracks’ file names star with
1-1…
1-2…
1-3…
2-1…
2-2…
2-3…

I have absolutely not image files or anything other than the actual music files in the folders, all cover art is embedded in the files. That makes organizing the music collection or changing things way easier for me.

Like probably many people, when I started ripping my CD collection years ago, I spend some time giving the tagging some thought, since I started with iTunes (yeah, I know the program has issues, as does every other program) and that was obviously suited for pop music, yet most of my music collection was classical music, with also film scores and jazz. There were a number of things that were important to me, like consistency, a certain order in the folder structure, and cross-platform and cross-device compatibility of the tags. (What good are tags that are only interpreted as intended on one device or app, but not on another?)

Interestingly, the two “War of the Worlds” albums mentioned show up correctly in iTunes, in MusicBee, in Twonky, in MiniumServer, in HifiCast, in USB Audio Player PRO, and in the T+A Music Navigator App (my streamer’s native app). (As do all the compilations I mentioned.) It’s just in Roon that these four “discs” (first album is ripped from my CDs, the second is a high-res download from Qobuz) are listed as one album, or that some compilations are split for no apparent reason. Interesting. So while Roon does a lot of cool stuff, it also does some really odd things.

The albums as they appear in iTunes:
Jeff Wayne war of the worlds in itunes

@Nick_Zwar I appreciate your hard metadata work, and I want to ask: Were you meticulous to ensure that:

  1. You don’t have any tracks in your collection whose track artist is “Various Artists”?
  2. You don’t have any albums in your collection whose album artist is different across the tracks of the album?

Re the Jeff Wayne albums, I notice that Roon, like in your iTunes screenshot, does in fact differentiate between the two album releases; they show up as different releases (with different release dates) in his discography in Roon.

So I suspect that there is something in the metadata in one or both of these albums that is confusing Roon and causing it to merge the two.

I don’t think this is the various artists bug but it does look similar behaviour by this looks like just bad matching due to some metadata being off. You might think it’s meticulous but it’s likely one small thing that isn’t. I have thought it’s often Roon but when looking it’s just one small mistake metadata wise has set it on the wrong path.

Big difference with those apps you mention and Roon is they only use your metadata they don’t attempt to match the album to metadata available in online databases such as MusicBrainz and TiVo this is Roons first step. If the album isn’t in these databases then it’s left unidentified. This is where Roon pulls the extra information it shows for the album and tracks etc. If track counts vary or one bit of metadata is off it can through it off completely, matching to the wrong version and split them up into what it thinks they match to.

Artwork is pulled from the highest res available this more often is online sources and the most recent ones it tends to get this wrong often for the version of the album you might have so you have to manually change it. Or set before import to use your own only.

Hi DDPS,

thanks for stopping by and chipping in.

Qutestion 2:
I have no albums whose album artists differ across the tracks of the album; other software and server would split albums as well if the album artist changes, so the album artist is always the same across all tracks of an album.

Question 1:
I just checked and actually did find two tracks where the artist was “Various Artists”; an old Opus 111 Catalog CD where I guess I did not have the Metadata at the time. Interestingly enough, Roon correctly identified the album and provided the metadata I now filled into the actual files as well.
So of close to 100,000 files, I had two where the artist tag was set to “Various Artists”. It does not seem to influence the problem though.

If there is one thing I have learned over the years, it’s that in a music collection of a certain size there seems to be always opportunities to improve metadata here and there.

May well be it’s metadata, though I can’t really figure out what that would be. Metadata is always the first thing I check if something doesn’t show as expected in any music server software. However, as far as I can tell so far, The War of the Worlds seems to be the only album “merged” (that I’ve noticed), and I think Roon simply misidentified the “The New Generation” album, as the credits it inserts seem from one of the other War of the Worlds albums (with “Max Mondo” mixes etc. of "The War of the Worlds). That seems to be minor issue and easily corrected, so I’m not really “worried” about the merging of these two albums. That’s easy to fix.

Hi CrystalGipsy,

thanks for stopping by. No doubt you’re right. If there’s one thing I’ve learned over the years is that no matter how well organized my music collection seems to be, I always find here and there small things to improve or fix or better in the metadata.
It’s just a head scratcher if you can’t figure out what that small issue might be that sets Roon on the wrong path.

Yes, thanks, I see that is how it works, and that’s all okay. I am just wondering if I have a boxed set where every album has a different cover art, WHICH album art Roon is picking from my OWN cover art? Most programs I know pick the first, and a few the last cover art of a set album, Roon picks… any… not sure if it looks through all the cover art within the files of an album and then selects that which it considers “best”? Just trying to understand it.

To show an example what I meant I made screenshots to compare how albums are shown (here in iTunes… but these albums show up pretty much everywhere else like that too):
Haydn iTunes

And here a snippet from the same section as these same albums show up in Roon:

Now Roon clearly picked a cover for the “complete symphonies” Haydn set from one of the albums within the boxed set. I am just wondering according to what criteria Roon chooses that particular cover art.

I know how to “FIX” this (I know I can let Roon pick cover art online, or explicitly select a cover art, etc.), I am just wondering how this works.

PS: The reason why I use different cover art within box-sets is simply that it makes navigating a larger classical music collection (where box-sets are nowadays a “common occurrence”) very easy across various applications. This type of tagging allows for box-sets to remain together (like all the Beethoven complete symphony cycles, I’d rather not have the individual symphonies all spread out as individual albums), yet makes scrolling and navigating through such sets easy, because you have visual identifiers for the various symphonies/concertos/albums/etc. whatever is contained in the box.

For example, here is the way the Haydn Symphony box-set is displayed on my Android Smartphone (via minimserver). This works across other devices in similar ways, so it’s not something I would easily give up. (In that case, I’d rather set individual box-set album covers in Roon).

Roon itself does this differently and organizes the box-sets according to works, like symphonies, concertos, etc. So that’s all fine too and works great. There is not “conflict” between these ways.

Here is the same section as displayed on Roon (Windows 11)

Yes, you said that you don’t have any cover art jpeg files in your boxsets, so then Roon may well just be randomly picking cover art out of the metadata. Who knows? We certainly don’t… :slightly_smiling_face:

But then again, I’ve just noticed it does the same when there are jpeg files in the boxset. I’ve got an 18 disc boxset of Delius’s music, and Roon has randomly picked the cover art file of disc 5 to display (and it is not the largest jpeg file either)…

Aha - I’ve just put a jpeg of the boxset cover art into the main folder (remember I use the CD1… CDnn subfolder convention for the individual discs) et voilá - Roon has replaced the CD5 cover with this new cover.

BTW, because I’m using jpeg files, Roon will list them all - are you not seeing this in your boxsets?

How Roon decides what to show is often a mystery even after 7 -8 years of use. Part of its charm I suppose.

Hi Geoff, thanks for the screenshot. No, I don’t see a selection of image files. In fact, that section “images” doesn’t exist in my album views, probably because all my cover art images are embedded and none are there in the folders.
But of course, I could select or upload an image to display for that album from within Roon.

Have you got any composer tags set at all? Maybe its just an unlucky choice of example but you don’t appear to have any composer or conductor tags set from that Haydn screen-shot?

For example. I would expect the Haydn No. 94 to look as follows:

Roon uses canonical forms of composition titles so that it can link your recording to hundreds if not thousands of recordings from its streaming partners. It is really common when new users migrate from other players that they have few if no tags set that roon is expecting so the initial migration can be very time consuming to get the most out of roon. Auto-taggers like SongKong which tag in a roon compliant way can be useful during an initial migration. For example, most legacy players set the composer as an artist rather than as a composer as roon is expecting.

Greetings!
Yes, composer tags are set. Practically in all of my music, even for songs (stuff like “White Christmas” has “Irving Berlin” as “composer” and Bing Crosby or Louis Armstrong or Aimee Mann or whoever as “Artist”.

The basic Haydn tag set is my usual standard “tag set” for (classical) music in my collection.

Album Artist: Franz Joseph Haydn
(In classical music, the “composer” is the “main artist”, the one supposed to group the music, album, and the music files.)
Artist: Thomas Fey: Heidelberger Sinfoniker
(Or whoever conducts, I think three conductors are involved. Unfortunately, many apps don’t do well with “multiple” artist tags, which is one of the major drawbacks tagging classical music. So I condense the most important information, usually conductor and orchestra, into the artist tag.
Composer: Franz Joseph Haydn
Genre: Classical
(Again, would love to get multiple genre tags, but most apps just don’t handle them well. Since cross-plattform use is important to me, I have found a way that works across many apps and gels with various UPnP/DLNA server and streaming software)
Title: Haydn: Symphony No. 64, HOB. I:64 ‘Tempora Mutantur’ in A major: Allegro con spirito
Disc Number: 2 of 36
Track Number: 1-8
Year: 1999

In fact, I have the Adam Fischer Haydn set as well (originally bought on Qobuz):
In Roon, it looks like that.