The Frescobaldi Thematic Catalogue Online
Frescobaldi (probably): F15.60.02. Sonata prima. Seconda parte.
Scoring: Keyboard
Genre: Variations (instrumental)
Key/Signature: G /♭
Main Source: Turin Foa 8
Notes: The opening phrase, through the beginning of the second measure, is nearly identical to F 2.35.01--the first variation in the 1615 version of the Romanesca--but after that the two variations diverge.