"The Duchess was as gay as a foal, always playing pranks and laughing, tricking out her animals like comedians, disguising herself as a peasant or a nun [...] or teaching the lads and girls of the vineyards to dance and sing madrigals together."[1]
Madrigals are songs for multiple singers, especially popular in the 16th century. They were usually performed acapella without any instrumental accompaniment.[2]
[1] Wharton 1901, p. 9
[2] see Hornby 2019, Nr. 10