With JM in the AM deep in its Sefirah format, Nachum Segal hosted A cappella guru, and one of the hosts of the Stunt Show program here at the Nachum Segal Network (Thurs. 6-7p.m. ET),  Jordan B. Gorfinkel to discuss and play selections from the new, 23 selection Yom Tov A Cappella  Treasury CD. Nachum and Gorf spoke about the history of recorded Jewish A capella and how this collection came together. Once again the cream of the Jewish music crop, including Gershon Veroba, Eli Gerstner, Kol Achai, the Maccabeats, A.K.A. Pella, and more, have been gathered together to present a CD that is great for the Sefirah/Three Weeks time of the Jewish calendar and then all year round as well.