Perhaps see this earlier thread…

I saw that, but I’m unable to play any FLAC files, not just 44.1/16 FLAC. (I don’t know if that means my problem is a superset of that user’s problems or vice versa.)

Are other file/track formats working for you? It might perhaps be a transcoding issue on the Plex server-side. Maybe check you have the latest Plex server software installed and check the server settings (or speak to Plex Support).

If the issue isn’t resolved, it maybe best to first reproduce the issue, immediately submit a Sonos system diagnostic report from within the Sonos App, note it’s reference and then contact/chat with Sonos Support via this LINK to discuss the matter in detail and see what the Staff can perhaps suggest to resolve the matter.

Yes. MP3s work. And I don’t think it’s a transcoding issue, because as I stated in my OP… this seemingly was fixed in the beta software earlier this year. Playing the files in Plex and PlexAmp work, so I don’t think it’s a transcoding issue or an issue with Plex itself. That said, PMS is at the latest version.

I’ll submit a diagnostic report, contact support, and report back as you suggest.

That said, I do want to apologize if I sound like I’m being snippy with you. (I promise that I’m not.)

I didn’t/don’t take your posts in that way honestly - I just really hope you can get the matter resolved. Perhaps be good enough to post back if you do find the answer, as it might assist other Plex/Sonos users who pass by here too.

That’s a relief! And I absolutely will!

Hi, was there any resolution found that FLAC cannot be played via Plex service?

I have the same issue. Playing MP3 via Plex on Sonos goes fine, but none of the Flac files can be played. However playing Flac in Plex App (outside Sonos) goes fine. So it has something to do with how Sonos gets connected to Plex server.

thanks for an answer

any update on this .I have the exact same problem described here. Have an Era 300.  Plex , can play mp3 but not flac or m4a