This is the Terrafon, which is basically a huge turntable for the earth. Designed by artists Olle Cornéer and Martin Lübcke, the Terrafon premiered at the Volt Music Festival in Sweden.
The sound of the Terrafon is pretty much what you’d expect from something being dragged across the ground. The video does a good job at capturing the variations in sound, but mostly it’s the sounds of rocks or gravel being rubbed against something. It reminds me of when I was a kid and would drag things behind my bike.
The look of this thing is very cool and made me think of other ways to use something like this, rather than necessarily making it performative, what if there was something large and industrial-looking like this installed along the river, or at the entrance to old industrial buildings, what sounds would it make?