I love this so much.
Imagine being a resident of that town and one day the constant, unending low hum in the background of your hometown changes, ever so slightly--would the town feel different?
These sorts of arty weirdnesses should be everywhere, for everyone.
Here's a free link to the full article: https://archive.ph/rHOsC
And here's a video of the chord change, set from right around the moment of the change (which isn't terribly different): https://youtu.be/L1a1CpaBovQ?t=1041