Cannot sync Opus to Android
Submitted by ros..@..il.com
Android has had support for Opus since version 6.0 (Marshmallow) but it's not been quite ideal.
As far as I understand things, Android does not advertise Opus through MTP. Interestingly enough, if a .opus file is renamed to .ogg, it plays fine in Marshmallow and above.
A funny side note: Lollipop supports Opus but only inside Matroska containers.