Tab Groups in macOS Safari should give you the option to retain audio playing in other Tab Groups.

When you leave a Tab Group in macOS Safari, any audio playing in that Tab Group will pause, which I find annoying and I’m sure others feel the same way. I can see how this makes sense for some workflows, but there should be an option to retain audio playing in other Tab Groups. Simply place an additional audio glyph in the Tab Group selector to guide people to the audio source in their web of Tab Groups.