757 - 761 RAV JUDAH (Yehudai) GAON OF SURA (Babylon)
Also known as Judah the blind. He was one of the leading presenters of the liturgy, or Shliach Tzibbur, and favored the new practice of professional cantorship (hazzanut). He recommended that an ABA (ternary) musical format be used , so that beginning and end of each piece be similar, with some variance in the middle. He also introduced the chanting of Kol Nidre into the synagogue. Yehudai wrote Halachot Ketuot and probably Halachot Pesukot which was the first work on traditional law since the completion of the Talmud.There is a controversy as to whether he also the author or partial author of Sefer Halachot Gedolot, but most believe it was written by Simeon Kayyara, (see 825). He was a vociferous proponent of the acceptance of the Babylonian Talmud rather than the Jerusalem Talmud as the basis for all Halachah.