Clarinet Quintet (Mozart)

Wolfgang Amadeus Mozart's Quintet in A major for Clarinet and Strings, K. 581, was written in 1789 for the clarinetist Anton Stadler. A clarinet quintet is a work for one clarinet and a string quartet (two violins, a viola and a cello). Although originally written for basset clarinet, in contemporary performances it is usually played on a clarinet in A or B-flat for convenience's sake. It was Mozart's only completed clarinet quintet, and is one of the earliest and best-known works written especially for the instrument. It remains to this day one of the most admired of the composer's works. The quintet is sometimes referred to as the Stadler Quintet; Mozart so described it in a letter of April 1790.

A fragment of score exists for a second (though possibly written first) clarinet quintet in B-flat, of which a complete exposition survives. It is possible that Mozart completed the movement, as the score continues into the development section on the last surviving page. This fragment is unlikely to be a sketch, as it bears no marks of correction. Nevertheless, the A major quintet is Mozart's sole surviving complete work for clarinet quintet.

The composer indicated that the work was finished on 29 September 1789. It received its premiere on 22 December of the same year, in one of the four annual Vienna performances of the Tonkünstler-Societät, an organization that existed to fund pensions for widows and orphans of musicians. The main item on the program was a cantata, Il natale d'Apollo, by Vincenzo Righini; Mozart's work was performed between the two halves of this work. The solo clarinet part was taken by Stadler, the first violin part by Joseph Zistler.

The quintet consists of four movements:

The first movement sets the mood for the entire piece. It has beautiful moving lines in all of the parts and in the second half there is a virtuoso run that is passed throughout the strings, based on material from the second section of the exposition.

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