It's an beautiful composition of pastoral arias: French horns, soprano aria with choral choir and graceful lilting backdrop among the counter melodies of cello, strings, and flutes.
Classical music, vesper arrangements, especially like this type of one with an pastoral quality, is what I listen to when I'm working on projects (art and beyond), here at home.
https://soundcloud.com/umamusic/uma-...ja-rachmaninov