Assandra's musical talents were noted by the publisher Lomazzo early in her career, in his dedication of the works of Giovanni Paolo Cima.
[4] In 1609, Assandra took vows and entered the Benedictine monastery of Saint Agata in Lomello, in the Lombard region of northern Italy.
Two works by her, otherwise unknown, also appear in German tablature in a manuscript located in the Fürst Thurn und Taxis Hofbibliothek (court library) in Regensburg.
Researchers suggest Borsieri must have heard in her music the influence of Agazzari, whose small-scale works had recently been published in the city.
On February 20 of 1606, publisher Giovanni Paolo Cima dedicated a portion of his Partito de Ficercari & Canzoni Alla Francese to Caterina.