This program brings together four string virtuosos: world-renowned cellist Yo-Yo Ma, bluegrass fiddler Stuart Duncan, bassist Edgar Meyer and mandolin wizard Chris Thile. While each artist is a prominent figure in their own musical sphere, they have come together for their first concert to create what critics are now hailing as "a most remarkable and organic cross-genre project in which the fire and drive of the bluegrass world meets the clarity and class of the classical music world." The concert was recorded at Boston's House of Blues.