From an extensive website of Jewish Liturgical music assembled in the USSR, this is one of three recordings under the direction of Mr. Max Neumann, the last choir director in the Adas Jeschurun shul in Frankfurt AM. After the war, he settled again in Germany and continued to lead choirs. The biography below from that website http://yiddishmusic.jewniverse.info/neumannmax/index.html Special thanks to my friend Z. Edinger for alerting me to the existence of these recordings.