After the publication of the complete keyboard works within the TC580600 boxset, with this album Tactus begins the world premiere of the Frescobaldi unpublished manuscripts, whose attribution has finally come to an end after years of work by Constance Frei and Etienne Darbellay, the most accredited musicologist in the studies concerning the great composer from Ferrara, and curator of the most important printed edition ever made of his keyboard works. Ivana Valotti, at the Antegnati 1565 organ in the Palatine Basilica of Santa Barbara in Mantua, performs a variegated anthology of toccatas, canzonas, and ricercars. The music is taken from the Chigi codices, a seventeenth-century collection of vocal scores and keyboard manuscripts collected by the Chigi family, which has in its leading exponents Fabio Chigi (alias Pope Alexandervi)and his nephew Flavio (cardinal), donated to the Vatican Apostolic Library by the Italian state in 1924.