
[textless duo in C – Ut re mi fa sol la]

| Banchieri (1609), 2: Secondo Duo. | The duo is based on the solmization obbligo Ut re mi fa sol la (hexachord). |
| Gruber (1673), 12: Discipulus. MAGISTER. | The duo is based on the solmization obbligo Ut re mi fa sol la (hexachord). In all likelihood, the source employed by Gruber was the 1614 edition of Banchieri's Cartella. |
| Bornstein, Cartella | Modern edition of all the duos found in Banchieri's treatise Cartella. |
| Wilbert, Banchieri | Twelve duos found in the 1614 edition of the Cartella. |
| Solmization obbligo Ut re mi fa sol la (hexachord). | For more information, see Bornstein, Italian Duos, vol. I, p. 166-69, vol. II, p. 430-31 and vol. III, p. 106-07; Bornstein, «Solm I» and Bornstein, «Solm II». |