Although Leipzig is well known as a city with a rich musical heritage, now and then some aspects of its musical history are overlooked. Günther Sonne, who conducts research into not only Leipzig’s musical history but also its energy supply, has established that there were very many vocal quartets in Leipzig in the 20th century. In his new book, he explores their careers, repertoire and roots in local choirs and concert halls. His lecture at the 2018 a cappella festival will provide a glimpse of this almost forgotten facet of Leipzig’s musical life.