Ascanio Mayone, (Diversi Capricci Libro2) 4.

Recercare sopra il Canto Fermo di Costantio Festa.

Costantio(Costanzo) Festa(ca.1490-1545) is one of the earliest composers of Roman School.

I can't research what is Cantus Firmus in this Recercare.

http://aeolianconsort.chakin.com/Mayone.htm