I have LAME, flac, sox, etc installed (by LMCE default installation).
I first switched the Admin website's Home -> Wizard -> Installation page Miscellaneous section settings from (installation default) ogg to flac, but ripping ("all" 3 in my VGP changer) produced Ogg files. I switched from flac to mp3, which ripping ("all" 3 in my VGP changer) still produced Ogg files.
Or so it seemed. Because when I tried to play the files, which always showed up as "trackname.ogg", no matter what I set the format to, they wouldn't play. I used the "play" commandline, which detects formats, but it rejected every format except MP3 (which I specified by renaming files to .wav , .flac , .mp3 and by specifying -t <type> on the commandline). When telling play the file is MP3, it played, but only a few seconds of squealy noise (the files are the right length for several minutes in any format). I tested only the files generated by setting the format to wav and to mp3, I'm not certain that "wav" files (still named .ogg by the ripper) were encoded wrong, though I didn't test them either way.
Then I changed the format settings to wav, and used the jukebox's "Manage drive" to rip just a single CD. It ripped everything into files named .flac , which I tested OK as actual FLAC files. I used the Jukebox's "Manage drive" to "rip all" (3 discs), which were again ripped to unreadable .ogg files. When I left the format settings the same (wav) and then ripped a single disc again (after deleting the "rip all" .ogg files from the filesystem and the entries from the database), they ripped into FLAC. So the "rip" and "rip all" codepaths are clearly different, with the "rip all" somewhat better, but both suffering from serious bugs.
When I delete ripped CDs, which I can do only from the commandline (or Kubuntu desktop), I use the Admin website's Home -> Files & Media -> Media Files sync. When I click "Resynchronize", it fails, with the "Cannot find self in maplock!" message as in
Bug 3538.
Sometimes the dump shows fewer successful completed steps, but always the "Cannot find self in maplock!" and "alarm: AlarmManager.cpp" message.