They have collaborated with many artists including cellists János Starker and Yehuda Hanani, pianists Santiago Rodriguez, Cyprien Katsaris and Rudolph Buchbinder, tenor Ramón Vargas, and guitarists Narciso Yepes, Sharon Isbin, David Tanenbaum and Manuel Barrueco.
Sierra was commissioned by guitarist Manuel Barrueco to write a concerto that tried to capture what that might have been like.
Manuel Noriega | Joan Manuel Serrat | Manuel I of Portugal | Manuel de Falla | Juan Manuel Santos | Manuel L. Quezon | Manuel Belgrano | Manuel Alejandro | Manuel Castells | Manuel Zelaya | Manuel Álvarez Bravo | Juan Manuel de Rosas | Víctor Manuel | Richard Manuel | Manuel Requena | Manuel Mujica Láinez | Manuel II of Portugal | Manuel Roxas | Manuel Pineda Munoz | Manuel Oribe | Manuel Mijares | Manuel L. Quezon University | Juan Manuel Márquez | Juan Manuel Fangio | Manuel Valera | Manuel Penella | Manuel I Komnenos | Manuel Barrueco | Charlie Manuel | Manuel Ugarte |