Water comes in. Music comes out. That’s what you’d expect from a “sea organ.” Inspiration today comes from architect Nikola Bašić, and his organ built on the Adriatic Sea in Zadar, Croatia. As noted on Colassal.com, “The acoustic jetty spans some 230 feet (70 meters) and incorporates 35 polyethylene tubes of varying diameter. As waves flood each tube underwater, displaced air is forced through large whistles tuned to play seven chords of five tones. Day in and day out, music seems to emanate from the ground, a playful interplay between nature and design.” Wunderbar.
http://www.thisiscolossal.com/2015/11/the-sea-organ-makes-perpetual-music-with-ocean-waves/
Architectural interview and breakdown (with sketches)
http://www.croatia.org/crown/articles/9359/1/nikola-baiae-author-of-the-zadar-sea-organ.html