I'm using Opera on the latest Linux Mint. I have a 5.1 Surround System, which is working fine system wide (even with Opera) with one exception. I cannot get Surround Sound on YouTube. YouTube is outputting 5.1 fine using Firefox. I am using HTML5 on YouTube. Is anybody aware of this and has a fix? I've tried adding --disable-audio-output-resampler and --force-wave-audio to /usr/share/applications/opera.desktop without success.
Opera is up to date
System:Linux Mint 19 (x86_64; X-Cinnamon)