The “Chimes of Bach” is the name of a set of wind chimes tuned, evidently, to the first chord of Bach's Prelude in C from the Well-Tempered Clavier, Book I. The chime maker, Woodstock Chimes, offers a lifetime tuning guarantee and claims “the Chimes of Bach can turn your garden into a concert hall.”
The chimes do sound lovely. Have a listen here.