For 10 points, name this second-smallest instrument of the strings section, which reads in alto clef.
A lento pastorale opens Debussy's sonata for flute, harp, and this instrument. Paganini was infuriated by the number of rests for this solo instrument in a symphony he commissioned for it, which represents the title character "In the Mountains" and a "March of Pilgrims". The first movement of Brahms's German Requiem gives the upper melody to this solo instrument of (*) Harold in Italy, since it omits violins. For 10 points, name this second-smallest instrument of the strings section, which reads in alto clef.
A lento pastorale opens Debussy's sonata for flute, harp, and this instrument.
viola da braccio