I take this request back or at least give it super low priority. I found a better way to save Atmos files as .m4a. That format already supports full tagging in foobar2000.
Is there any news now that .mlp also supports Dolby Atmos playback? It would be neat if tags could at least be stored in metabase/xml.
The get .mlp files with TrueHD/Dolby Atmos you can follow these steps: Rip with DVDFab to .mp4, preserving the chapters so you create individual tracks. Load each track in avidemux using "Audio/Save Audio" from menu and add .mlp extension. Not .mlp: You can also rip with DVDFab to .mts with individual chapters and then use MkvToolnix to mux to .mka, discarding the video track.
That seems to have fixed it. Thank you very much for your quick intervention!
Problem with splitting multi-value fields
It works here. I'm guessing it has something to do with the option "std tag editor" which I have checked.
No failure there. I love it that you're constantly pushing the plug-in and you're always fast to respond. Many thanks to you!
Tag editing doesn't work