What is the format of Machaut's song "Puis qu'en oubli"?

The song "Puis qu'en oubli" by Guillaume de Machaut is a prime example of medieval polyphonic music, specifically a type known as a chanson. The piece is composed for three voices, showcasing Machaut's ability to weave intricate melodic lines together in a harmonious and polyphonic texture. The use of three voices is significant as it highlights the complexity and sophistication of the music from this period, allowing for various interweaving parts that create a rich auditory experience. Being a cappella means that the work is performed without instrumental accompaniment, focusing solely on the vocal harmonies, which further emphasizes the skillful interplay between the voices. This format exemplifies the transition in music during the late Middle Ages toward more elaborate and structured forms of composition, setting a foundation for the development of more advanced polyphony in later musical periods.