Look into your system’s temp folder.
You will find one or several folders in there with “sonic” in their folder name.
in them, there are WAV files.
If you find a WAV file of a suspiciously small file size, it can be a good hint at which file is the culprit. You should be able to identify the album, just by listening to the wav files.
Another method is to enable server debug logs.
Then look at the Plex Media Server.log It should at least tell you which albums were last committed to the analyzer.
On Windows, get Sysinternals Process Monitor Process Monitor - Windows Sysinternals | Microsoft Docs
Then filter for instances of the Plex Transcoder. You should be able to find out which audio file is opened by the “hung” transcoder process.
