Within the context of the compositions of Girolamo Frescobaldi (1583-1643) the "Liber secundus diversarum modulationum Singulis, Binis, Ternis, Quaternisque vocibus" published in Rome in 1627 is of particular interest for several reasons.

Firstly, it came down to us through a single copy, published in part-books and lacking the "Cantus secundus"; secondly it represents a rare example of Frescobaldi’s vocal - and in particular sacred - music printed in a particularly fertileperiod of his activ...