Part of my dissertation on the 'Dixit Dominus' settings of Zelenka included editions of two of Zelenka's unpublished 'Dixit Dominus' settings (ZWV 66 & 67). In the spring of 2017 I recorded 'Dixit Dominus' (ZWV 67) with my students at Brookline High School, a suburb of Boston, Massachusetts. The students in this recording range in age from 14-18 years old. Zelenka likely composed this piece for the Kapelknaben, with the soprano and alto parts sung by the Kapellknaben and the tenor and bass parts sung by men. I believe this is the first recording of this work, which I have linked below. I'm hoping to get my edition of the score published at some point soon.