The Volute of the Ionic Capital

How to draw the volute of the Ionic capital following the method canonised in 1552 by the painter Giuseppe Porta Salviati (1520-1575) Music by Antonio Lucio Vivaldi (1678-1741) Concerto for violin, strings and basso continuo in A major, called “Il Rosignuolo” (RV 335a); Second Movement: Andante Musica ad Rhenum - Jed Wentz, conductor; Manfredo Kraemer, solo violin