The service of Tenebrae has been my favorite Holy Week experience since I first experienced it in 2010, though I've never sung any of the exquisite settings of the Lamentations (Dear Universe... *hint*). Check out this awesome video from Early Music Sources about the Lamentations and how Lassus and Cavalieri wrote their settings!
Cavalieri's Lamentations
I loved exploring these pieces with my colleagues in Miryam a few years ago, and I wish our edition had included these markings! Thanks as always to Early Music Sources for bringing this to life!