In the vast developed areas that sprawl between our cities, quiet places are even harder to find than open spaces. Even Walden Pond, Henry David Thoreau's symbol of tranquillity has so many visitors and nearby roads that real solitude is nearly impossible to find there. But, Thoreauvian solitude is what Peter Acker seeks. Mr. Acker crisscrosses New England collecting natural sound from places Thoreau visited and wrote about: the Maine Woods, Cape Cod, and Walden. He plans to release a three CD set of these recordings later this year. Producer Kim Motylewski set out to find out what Peter Acker, and the rest of us, are up against in the search for the true sounds of nature.