Media Details - What does "Has Voice Activity" relate to?

Anyone know what Has Voice Activity means within the media details of the dash app?

Here is a screenshot…

I bet it’s magic subtitle alignment voice activity analysis, but I’m curious to know for sure.

Yep. From Settings → Library:

Ah, could be.

I’ve that feature disabled which could be why it’s blank. I’ve never had trouble with subtitles so didn’t bother enabling it.

Thanks folks.