The French Horn is a member of the Brass Family usually found in Orchestras and Wind / Military Bands. It has a wonderfully full and rich sound and is used to great emotional effect making it a popular choice for composers of film scores. French Horns, with conical bores, rotary valves and large bell flares are more complicated to manufacture than most brass instruments making them generally more expensive. The most common categories are Single, Double and Compensating. Here I will try to explain the differences in fairly simple terms to give anyone looking to purchase a French Horn a better idea of which type may be most suitable for their needs.