I just love this ambient album by japanese artist Hiroshi Yoshimura. The album was commissioned by home builder Misawa Homes Institute of Research and Development to be played in their newly built living spaces:

Originally released as an album in January 1986, Surround was recorded by Yoshimura as a commission from home builder Misawa Homes, intended to function as an “amenity” designed to enhance the company’s newly built living spaces. A pioneer in the field of environmental music, Yoshimura’s previous works included Music For Nine Post Cards (1982), originally produced to be played back inside a museum space, and designing sound environments for public spaces and subway systems. Surround was recorded almost concurrently with the acclaimed and popular GREEN (1986); the two albums are described by Hiroyoshi Shiokawa in his liner notes as being Yoshimura’s yin and yang.