This instrument accompanies the aria “Parto, parto, ma tu, ben mio” from La Clemenza di Tito. Ravel remarked that he wrote the slow movement of his G major piano concerto while “under the spell” of the Larghetto from a Mozart chamber piece that features (15[1])this instrument. (15[1])In the Adagio movement of a concerto for this instrument, the soloist enters immediately with the notes, “A, long D [pause], F-sharp F-sharp E D.” (10[2]-5[1])This instrument joins (10[1])viola and piano in Mozart’s (*) “Kegelstatt” (-5[2])trio. Brahms and Mozart both wrote late quintets for this instrument and (10[1])string (10[2])quartet, respectively for Richard Mühlfeld (10[1])(“REE-card MOOL-felt”) and Anton Stadler. It’s not horn, but (-5[1])Mozart’s last instrumental work was an A major (10[1])concerto for the (10[1])“basset” variant of this instrument, which (-5[1])is pitched in A rather than (10[2])the (10[2]0[1])usual B-flat. For 10 points, name this single-reed woodwind. ■END■