Halakhah sobre Jueces 5:1

Much earlier, shortly after World War II, Rabbi Yechiel Ya'akov Weinberg was asked by the leaders of Jeschurun, a Jewish youth organization in France, whether it was permissible for them to sponsor programs in the course of which boys and girls sang together. Rabbi Weinberg, Seridei Esh, II, no. 8, reports that, still earlier, he had been surprised to discover that in observant homes in Germany men and women habitually sang Shabbat zemirot together even when guests were at the table and that, at first, he had protested against this custom. However, upon investigation he learned that the practice had been sanctioned by Rabbi Samson Raphael Hirsch and by Rabbi Ezriel Hildesheimer. Subsequently he found that Sedei Hemed, Klalim, ma'arekhet ha-kuf, no. 42, cites a Sephardic authority who sanctions this practice on the basis of the principle that "Two voices cannot be heard" adducing as evidence the verse, "Then sang Deborah and Baruch the son of Abinoam on that day" (Judges 5:1). Since Deborah and Baruch apparently sang together this verse appears to demonstrate that there is no objection to mixed singing. However, in another context, Eliyahu Rabbah, Oraḥ Hayyim 75:5, declares that this incident cannot be cited as substantiating any point of normative halakhah since it is to be viewed as an isolated occurrence which was divinely mandated.