Using a double reed, it's the main bass instrument of the orchestra's woodwinds
The cor anglais, or English horn, is a 
slightly larger double reed instrument with a deeper, gentler tone, that is 
sometimes... [DOC] [TLE] Instruments of the Orchestra | San Luis Obispo Symphony [PAR] Four strings (sometimes five on the double-bass) made of animal gut, nylon, or 
steel ...