From WILL - Classics of the Phonograph -

Pioneering Recordings of Old Music

A vast amount of music from the Middle Ages to the 18th century, especially from the Baroque era, is now available on recordings. It was not always so. The attempts of pioneers in recording old music in authentic performances began only in the 1930s. In the next 20 years, ambitious collections were put on discs, such as the Anthologie Sonore from France. Famous teachers, such as Nadia Boulanger, made pioneering recordings of Monteverdi madrigals. We'll listen to some of these trail-blazing recordings.