Field-recordings maestros OLHON are back with a new stunning album. "Underwater passage" is based upon underwater recordings taken in 2006 by Zairo (WHERE), then treated by Massimo Magrini (of BAD SECTOR fame). These recordings were taken using special sensing microphones attached to an abandoned telephone cable running on the sea bottom at -40 m.; they were then processed with particular demodulating treatments, resulting in a complex and rich ambiental monument. Strange clicks, impulses, a load of movements. Definitely far from the usual concept of dark ambient = low-rumbling drones only, "Underwater passage" shimmers with cutting mid/high frequencies bursts. A very challenging listening. Uv-vernished digipack.