Congregación was the most legendary of the many excellent bands of the early 1970's Chilean music scene -- one could easily say that for many people, this album has had the impact of a religious experience. There is good reason for that: Congregación's music has a highly evocative sense of space, using natural sounds, native Andean instruments, and acoustic textures to foreground ecologist and mystic Antonio Smith's soaring melodies and deeply felt, philosophical lyrics. The results make this on…