Every year, the Library of Congress' Registry honors 25 "culturally, historically or aesthetically significant" recordings. Among the gems on the new list are the soundtrack of The Sound of Music, cellist Yo-Yo Ma, and recordings of music by Christopher Rouse, Steve Reich, Richard Maxfield, Pauline Oliveros.
In the avant-guarde release New Sounds in Electronic Music, (1967) Oliveros used 12 tone generators, an eight-second tape delay and reverb to create a dense, reverberant recording that was entirely improvised; individual sound will rise to the surface and fade only to repeat later and disappear altogether.
