Board Thread:Support Requests - Getting Technical/@comment-1188484-20191028230918/@comment-168424-20191029180228

See: https://en.wikipedia.org/wiki/Opus_(audio_format)

Among other things it says "Opus replaces ... Vorbis" which means while parts of it may be compatible with Vorbis, it is more like a superset at best, so something that supports only Vorbis has a high likelihood of not supporting Opus. It's like expecting something that supports only MP3 to play MP4 (not the best example, but close enough).