Someone was curious whether you can build an electric guitar where the strings are connected to the body not via the usual bridge, but free-floating using a magnet with 250 kg of pull force.
https://www.youtube.com/watch?v=ueCO4spGNPs (15 min)
tl;dw: Yes you can, but aside from some fancy bends it doesn't sound all that different, and is highly dangerous.
Magnetically hovering guitar strings (sounds unreal)
YouTube