"Mem" from Crecquillon's Lamentationes Jeremiae, from New York Polyphony's album endBeginning (BIS-SACD-1949, available 2/28; eClassical download already available).
Two fun facts about New York Polyphony baritone Christopher Dylan Herbert: in his capacity as an observer of Middle Eastern affairs, he has worked for the Defense Advanced Projects Research Agency's Integrated Crisis Early Warning System; and he is Martha Stewart's nephew.