The software will be launched on May 29 at Where 2.0 conference, but you can hear some of the sounds at Wild Sanctuary's Flash site.
"Maps have traditionally been two-dimensional reference points. Even with 3D perspectives an essential component has been missing--the soundscape. Like the soundtrack to a film, this final element not only answers the question Where am I? but informs the viewer what they can expect to find either in a virtual or actual visit," explains Mr. Krause.
Google Earth already integrates content from National Geographic, Discovery and other sources: photos, videos, live webcams, articles, but most of them are loaded outside Google Earth, in a web browser.