An illustration of an 18th century English Horn. The cor anglais, or English horn, is a double reed woodwind musical instrument in the oboe family.It is a transposing instrument pitched in F, a perfect fifth lower than the oboe (a C instrument), and is consequently approximately one-third longer. The fingering and playing technique used for the cor anglais are essentially the same as those of the oboe. Consequently music for the cor anglais is written a perfect fifth higher than the instrument actually sounds. This means that the fingering is the same as for the oboe. Its sounding range stretches from the E (or, rarely, E flat) below middle C to the C two octaves above middle C.