I added a FLAC file to a Joplin note. It seems to be recognized as an audio format, because the playback controls appear, but the controls stay greyed out. Other formats like WAV play fine.
Is FLAC a supported format? Is there a list of supported formats somewhere?
So if do a bunch of assumptions, then Joplin is based on Electron which is based on Chromium. Chromium supports the following codecs and thus Joplin should be able to play FLAC...