Mozart's Clarinet concerto in A major, K. 622 was written in 1791, shortly before Mozart's death, for the clarinetist Anton Stadler.
It consists of the usual three movements, in a fast–slow–fast form:
1. Allegro (in A major and in sonata form)
2. Adagio (in D major and in ternary form)
3. Rondo: Allegro (in A major and in rondo form)
It was also one of Mozart's final completed works, and his final purely instrumental work (he died less than two months after its October premiere). The concerto is notable for its delicate interplay between soloist and orchestra, and for the lack of overly extroverted display on the part of the soloist (no cadenzas are written out in the solo part).
The second movement, marked Adagio, is a rounded binary form (i.e. ABA'). (It was popularized by the film Out of Africa.) It opens with the soloist playing the movement's primary theme with orchestral repetition. The B section, in which the solo part is always prominent, exploits both the chalumeau and clarion registers. The only true cadenza of the entire work occurs right at the end of the B section, immediately before the return of the A section. There are some passages that exploit the lowest notes of the basset clarinet in the B section.
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Composer Mozart, Wolfgang Amadeus Instrument Piano