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) for another seven years. British conductor and composer Brian Newbould, an authority on Schubert's music, has speculated that the symphony was left incomplete due to problems Schubert faced in orchestrating the sketch. In 2012, Newbould was commissioned by BBC Radio 3 to complete the symphony. He had previously completed three other unfinished symphonies by Schubert (the seventh (D 729), eighth (D 759), and tenth (D 936A). At that time he had done work to make the existing fragments of D 708A performable, but this was his first attempt to go beyond the fragments and complete the entire structure. His completed