Equivalent terms include English: curtal, German: Dulzian, French: douçaine, Dutch: dulciaan, Italian: dulciana, Spanish: bajón, and Portuguese: baixão.
The dulcian is generally made from a single piece of maple, with the bores being drilled and reamed first, and then the outside planed to shape.
The reed on the dulcian is fully exposed, allowing the player to control the sound and intonation by embouchure.
A set of instruments in various sizes exist in Brussels: these have a maker's mark of "Melchor" and are thought to be Spanish.
The dulcian is a flexible instrument, capable of being loud enough to play in outdoor bands, quiet enough for chamber music, and expressive enough to join in with the choir.