The International Opera Workshop Waiblingen will hold its seventh edition from Sept. 12 through 19 in Waiblingen, Germany. Twelve singers selected from a competitive international pool will participate in six days of public masterclasses before performing alongside soprano Melanie Diener, baritone Thomas Hampson, and the Württembergische Philharmonie Reutlingen under chief conductor Ariane Matiakh in a program of arias by Wagner, {…}