Clarinet Concerto (Mozart)

The Clarinet Concerto in A major, K. 622, is a masterpiece of classical music.

It was composed by Wolfgang Amadeus Mozart in October 1791. This work is considered his "swan song." This term describes a final, beautiful performance before someone dies. Mozart finished this concerto just weeks before his death. It was his second to last completed work. His very last was a piece titled "Laut verkünde unsre Freude." The concerto is a major achievement in the history of woodwind music. It showcases the incredible skill of a solo performer against an orchestra.

The concerto was written for Anton Stadler, a virtuoso clarinettist.

Stadler was a close friend of Mozart. He was also a co-inventor of the basset clarinet. This was a special version of the instrument. A standard clarinet stops at a written E. However, the basset clarinet could reach a written low C. This allowed the player to access a much deeper range. Mozart had written for the basset horn as early as 1783. He first wrote for the basset clarinet in 1787. He even used it in his opera Così fan tutte in 1789.

The music is organized into three distinct movements. The first movement is an Allegro in A major. It uses a structure called sonata form. It begins with an orchestral ritornello, which is a returning musical theme. The soloist then enters with a solo exposition. The movement includes a development section and a recapitulation. The second movement is an Adagio in D major. It uses a rounded binary form. This movement is slow and singing. The third movement is a Rondo in A major. It uses an A–B–A–C–A–B–A pattern. This creates a playful and repeating structure.

History shows how the original version of this music was nearly lost. Mozart gave the completed manuscript to Stadler in October 1791. However, the original handwritten score is now lost. Mozart's widow believed Stadler might have lost, pawned, or had it stolen. Because the original was gone, the music was published with changes. In 1801, publishers like André, Sieber, and Breitkopf & Härtel released editions. These versions changed the solo part for standard clarinets. They transposed the low notes to a higher, playable range. Some critics argued it would have been better to print the original notes as optional alternatives.

The significance of the concerto is seen in its popularity. It is the most frequently performed clarinet concerto of all time. A typical performance lasts about 29 minutes. The music requires great technical skill. In the second movement, the soloist uses the chalumeau register. This is the lowest register of the clarinet. The soloist also uses the clarion register, which is the middle register. In the Rondo, the soloist and orchestra engage in a dialogue. They sometimes seem to compete with one another. This competition tests the performer's virtuosity and speed.

In the late 20th century, musicians began to reconstruct the original sound. They used 1790s engravings to build new basset clarinets. In 1951, Josef Janouš gave the first modern performance of a reconstruction. This version was created by the composer Jiří Kratochvíl. In 1968, Hans Rudolf Stalder made the first recording using a basset clarinet. He worked with Ernst Hess on this reconstruction. Since 1984, Sabine Meyer has used a basset clarinet by Herbert Wurlitzer. These efforts allow us to hear the deep notes Mozart intended. They bring the unique colors of the basset clarinet back to the stage.

This concerto connects the history of instrument making to musical composition. It shows how a specific instrument can change the way music is written. Even without the original manuscript, researchers use fragments to rebuild the work. For example, Richard Haynes used a fragment called K. 621b to rewrite a version in G major. He performs this on a basset horn made by Jochen Seggelke. The story of the concerto is a story of recovery. It shows how artists and builders work together across centuries. We continue to find new ways to honor Mozart's final musical gift.