What if… this 8 foot guitar sculpture existed, and you could walk up to it, slide the points hold up the strings to change the pitch?
With three strings you could make chords.
You then bang or twang on the strings to make sounds.
You can also slide the points up and down to vary the pitch while you twang.
The colored shapes that act as handles to adjust the sliding points add a strong visual element to the work.
What shapes they would be… entirely up in the air.