The Metropolitan Opera Guild launched its second online course, “The Ring: Music, Motifs, and Magic,” on May 7, 2019. This course was preceded by “Libretti and Librettists.” According to the Guild’s website, the four-part course uses “video lectures, supplemental readings, and score excerpts” to examine Wagner’s “Der Ring des Nibelungen.” Prof. Victoria Bond will “provide insight into the musical evolution {…}