I’m thinking the mathematical phases: For me to understand what I’m looking at right now, this loop has to be synchronized in some way — maybe a little in and out of phase now and again – but generally in sync.
But not in a metaphorical way but in an actual way.
When two people listen to music, at least a portion of the brain is in sync with one another although really it’s that they’re each in sync with the music, which is why their scans look the same.
Ah there it is. https://www.livescience.com/28642-music-inspires-universal-brain-response.html