For her Piano Migrations Installation, Kathy Hinde took the inside of an old upright piano and transformed it into a kinetic sound and video installation. The projected birds seem to excite the strings as they fly by and sit on them.
The twitching and fluttering of small machines, fastened to the piano, touch the strings and cause them to resonate. The image is analyzed by the controlling software to make sure only the string closest to the moving bird is heard.