True enough: the main type of engineer you'd expect to speak the words "Opus codec" is a telecom/SIP engineer, not an audio engineer. It always feels like tech with origins in telecom never gets much notice outside of that realm, even when it's much more widely applicable. (Look at the set of "core" Erlang libraries to see what I mean. Think most programmers have heard of even half of the relevant standards, even as they implement NIH competitors to those same standards?)