Bioacoustics researcher and field recordist Bernie Krause. Krause has a new album called "Gorillas in the Mix." It features selections from new age to dance tunes. What makes the album remarkable is that every sound on it is from nature. Krause recorded and mixed together whales, apes, insects, the sound of shifting sands, and hundreds of other natural sources. Krause was a Motown session musician in the 60s, before earning a Ph.D. in bioacoustics.