@leocg where is opera://flags?

I'm not sure how to describe this and for some reason I can't upload any screenshots (I'm getting an error message when I try to upload any images). I just downloaded Opera GX and whenever I play audio on any tab, three white bars show up and go up and down with the audio kinda?

It's really distracting and I have no idea how to disable it, so can someone please tell me how to stop it?