Williams describes this stop as follows: Dulcayna or Dulzaina, Spanish reeds; 8' en chamade (below the horizontal trumpets) at Salamanca, 1744 (Echevarría). Conical resonators, but with no flare; and smaller than trumpets. Usually halved, allowing l.h. solos (Correa de Arauzo) similar to basse de Cromorne. Grove concurs, and adds �closer as an imitation of the dolzaina, a medieval reed instrument, than the northern types [of Dulzian].
Osiris contains eleven examples of Dulzaina (all reeds), five of which are en chamade; all are at 8' pitch except for two at 16', both from the late 20th century. The earliest ones are listed below. No examples of Dulcayna are known. Contributions welcome.