This is the Psalter according to the Greek translation of the seventy Translators, chanted by the monks at the Holy Cross hermitage.
The Lyrics are HERE: http://orthodox.seasidehosting.st/seaside/single_kathisma?_s=36qGFNLqVLRmemnq...
Buy the 3-CD recording:
http://www.holycross-hermitage.com/cgi-bin/commerce.cgi?preadd=action&key...
They are Russian Orthodox.
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