A composer known as Otto is best known for a concerto for this instrument premiered by the court musician Preger. Johann Baptist Neruda wrote a concerto most often played on this instrument, dedicated to Johann Georg Knechtel. The third movement of a concerto for this instrument opens with the notes [read slowly] “long B-flat, short E-flat, long C, short E-flat.” An 1803 concerto for this instrument, composed to mark its composer's entrance into (*) Prince Esterházy's court, closes with a rondo in E major, which is commonly transposed a step down. A keyed version of this instrument was played by (10[1])Anton Weidinger, for which Johann Nepomuk Hummel wrote a concerto. The notes [read slowly] “E-flat, F, G” open an E-flat major concerto for this instrument by Joseph Haydn. For 10 points, name this high-pitched brass instrument with three valves. ■END■