A QT LOGO APPEARS BUT NO AUDIO PLAYS?

Again I will ask you to not write in caps.

QT meaning QuickTime? If so, you can't play it in Opera or other Chromium based browsers because support for npapi plug-ins has ended a while ago.

And by the way, there are sites still using Quicktime?

CAN another AUDIO PLAYER like VLC OR ZOOM be used AND installed as a plugin in OPERA and made to respond to audio files clicked on to open in Opera for listening?

If they are npapi plug-ins like the VLC one, they will not work.

USING OPERA 36 ON XPSP3?
ANY THOUGHTS IDEAS? TIPS

Upgrade to a newer version of Windows. Over time, the problems will just going to become worse.