As a composer, Spohr produced more than 150 works with
opus numbers, in addition to nearly 140 works without such numbers. He wrote music in all genres. His nine
symphonies (a tenth was completed, but withdrawn: Cf.) show a progress from the classical style of his predecessors to
program music: his sixth symphony represents successive styles from "Bach–Handel" to the moderns; his seventh symphony represents the 'sacred and secular in human life' with a double orchestra; and his ninth symphony represents
Die Jahreszeiten (The Seasons). (The autograph score of the tenth symphony, which bears the complete work, is held by the Staatsbibliothek Berlin. Furthermore, the same institution holds a complete set of copied parts. Cf. also ). Between 1803 and 1844 Spohr wrote more
violin concertos than any other composer of the time, eighteen in all, including works left unpublished at his death. Some of them are formally unconventional, such as the one-movement Concerto No. 8, which is in the style of an operatic aria, and which is still periodically revived (
Jascha Heifetz championed it), most recently in a 2006 recording by
Hilary Hahn. There are two double-violin concertos as well. Better known today, however, are the four
clarinet concertos, all written for the virtuoso
Johann Simon Hermstedt, which have established a secure place in clarinettists' repertoire. Among Spohr's
chamber music is a series of no fewer than 36
string quartets, as well as four double quartets for two string quartets. He also wrote an assortment of other quartets, duos, trios, quintets and sextets, an octet and a nonet, works for solo violin and for solo
harp, and works for violin and harp to be played by him and his wife together. Though obscure today, Spohr's
operas
Faust (1816),
Zemire und Azor (1819) and
Jessonda (1823) remained in the popular repertoire through the 19th century and well into the 20th, when
Jessonda was banned by the
Nazis because it depicted a European hero in love with an Indian princess. Spohr also wrote 105 songs and duets, many of them collected as
Deutsche Lieder (German Songs), as well as a
mass and other
choral works. Most of his operas were little known outside of Germany, but his oratorios, particularly
Die letzten Dinge (1825–1826) were greatly admired during the 19th century in England and America. Spohr was a noted violinist, and invented the violin
chinrest, about 1820. He was also a significant conductor, being one of the first to use a
baton and also inventing
rehearsal letters, which are placed periodically throughout a piece of
sheet music so that a conductor may save time by asking the orchestra or singers to start playing "from letter C", for example. In addition to musical works, Spohr is remembered particularly for his
Violinschule (The Violin School), a treatise on violin playing which codified many of the latest advances in violin technique, such as the use of
spiccato. It became a standard work of instruction. In addition, he wrote an entertaining and informative autobiography, published posthumously in 1860. ==Selected recordings==