Sound art and the Web often go hand in hand. An ongoing online exhibition called "Crossfade" explores the intersection of both. Sponsored by the world's major supporters of new media art -- the San Francisco Museum of Modern Art, the Goethe-Institut, ZKM (Center for Art and Media, Karlsruhe, Germany) and the Walker Art Center (Minneapolis) -- "Crossfade" is a series of commissioned "media essays." They can take any form that can possibly be presented online, ranging from hyperlinked text to musical compositions that incorporate the network as an instrument. This month's featured online "media essay" is a sound archive by pioneering musician Stephen Vitiello.