Dominican Cloistered Nun sing the O Antiphon, "O Adonai"

[It is wonderful to see the chant tradition being restored and reclaimed. In their own description of this video, the sisters are apologetic for an off-key mistake at one part of the chant, but I can't say that any here would throw stones! All said, well done Sisters. These are the Dominican Sisters of Summit, New Jersey. They host a blog, Moniales OP]