M4a not saving to some fields

Hi @Christiaan

I am on macos and i am having some issues with m4a files (files from apple itunes store) not having some fields updated

so far i have noticed

  1. album art (this is empty in lexicon )
  2. label field - i use this for ALL TAGS, it gets populated in lexicon but empty when i bounce the track to serato

any ideas

Do you mean that it does not load the album art in Lexicon?

Label field: do you have a field mapping set up for that when you sync to Serato? Or did you use the Tag Writer?

No it does not pull album art from the internet for m4a files

I use tag writer. “Write to tags “

I check in Lexicon with reload tags prior to adding the files to serato. When I load the file in Serato I only see the tags written to comments for the m4a. Label field is empty.

Can you upload a few of those m4as so I can test them? http://upload.lexicondj.com


I just uploaded 3 files - m4a, alac (m4a) and aiff

repro steps


map lexicon to write user tags to LABEL and COMMENT field

  • In Lexicon

  • Right Click > Use > Write to Tags

  • Reload tags to check your work

  • Exit Lexicon

  • Load file in Serato (Directly, not export)

Label Field is empty

Remixer field is also affected


Try to do a ALBUM ART search for the m4a

Nothing shows up

I’ll check those files, thanks

Issues should be fixed in the next update, please let me know if it all works

1 Like


Came across this again yesterday

  1. TAGS not writing to m4a track LABEL field when mapped to do so,

  2. It writes to COMMENT field (when mapped to do that)

M2 Pro Macbook Pro

Latest Lexicon Beta

What LXC version exactly? There is no current beta version.

This is the version i’m on.

Are those all m4a files or only the top 2?

So only writing to the Label field does not work? Writing to Comment field does work properly?

Can you upload one of those m4a files? You can upload directly to me with this link: http://upload.lexicondj.com


Just sent you a track as requested.

Thanks, going to check that next week

Will be fixed in the next update


Did you ever get around to fixing this?

Still not fixed here.

I just downloaded a track from itunes store and they are m4a

That should have been fixed in 1.3.9

Can you send me that file? Which field is not saving?

Sent it now

“Label” field is the one i notice often as i write “my tags” to that column

The label tag (called Publisher) is in there:

But it looks like when you reload the Label tag in Lexicon, it doesn’t load it.

Correct. It does not load it in Lexicon.

And when i check it in Serato , it does not load it as well.

Okay, I’ll have to see what Serato looks for then.