Symphony No. 9 (Schubert) trombone as an effect, and therefore very sparingly, or, in the case of his Ninth Symphony, also to double the alto, tenor, and bass parts of the chorus as was common in sacred music and opera at the time. However, in Schubert’s Unfinished Symphony and the Ninth Symphony, the trombones become essential members of the orchestra playing throughout the piece, and even receive important melodic roles. Symphony No. 9 (Schubert) The Symphony No. 9 in C major, D 944, known as the Great (published in 1840 as "Symphony No. 7 in C Major", listed as No. 8 in the Neue
Symphony, D 708A (Schubert) the crescendo after the first statement of the theme is strongly reminiscent of Rossini's style. Unusually, the music reaches the key of A major during a climactic passage, using the chords of A major and C major. This means that the horns, trumpets and timpani have to remain silent despite their being conventionally present during climactic passages. This creates problems in orchestrating the symphony in Schubert's style, and is probably why the symphony was left unfinished. Due to the impossibility of using those instruments when necessary, Schubert considered using trombones for the finale, which could be used there. But because