Ernst Friedrich Eduard Richter (1808 – 1879), was a German musical theorist and organist. He first studied music at Zittau, and afterwards at Leipzig, where he attained so high a reputation that in 1843 he was appointed professor of harmony and counterpoint at the conservatorium of music, then founded by Felix Mendelssohn. On the death of Moritz Hauptmann on 3 January 1868, he was elected cantor of Thomasschule zu Leipzig, conducting the Thomanerchor, an office he retained until his death.
Richter's chorale trio's are heavily leaning on baroque/classical structures. They reminded me much of the chorale trio's by Homilius. So not very usual for the time they were written in.
The used registration is in the video. The sheet music is in the attachments. The score with Richter's complete Opus 29 is in the attachments.