Find out what is playing audio Lately I've been getting lots of bugs: songs from Safari playing without me starting them, or pausing youtube but it doesn't support but Safari says there is no sound from the tab, closing the tab doesn't stop it, or accidentally pasting a URL into Spotlight then being unable to stop the audio that starts playing.

I would like to know how to 


Find out what is playing audio
Stop it


Or, just 2 actually.

I want to stop unwanted audio from playing.

This happens on brand new Catalina 10.15.2
If this happens in Safari, the tab for a site that is playing audio
will have a small speaker icon on it. See the image below which shows 3 tabs in the top of my Safari window. Clicking on the
speaker icon stops it from playing. See the middle tab in the image.