Torino Manuscript - Ricercari Libro 1(17.c)
51. Fantasia sopra la sol fa re mi
Speaking of the note form “la so fa le mi,” I found it in Frescobaldi's capriccio. I thought it might be that one, but it was something else.
bar1-22 : A part
bar23-45 : B part, Theme with augument(C-Bass & Soprano)
bar45-67 : C part, Theme with augument(Tenor 1), diminution & inverse(bar54 Soprano)
http://aeolianconsort.chakin.com/Ricercari_Libro1_di_Torino.htm