What is ravel concerto for left hand?

Ravel's Concerto for the Left Hand was composed between 1929 and 1930 for the Austrian pianist Paul Wittgenstein, who lost his right arm during World War I. The concerto premiered in January 1932 in Vienna, with Wittgenstein as the soloist accompanied by the Vienna Symphony Orchestra conducted by Robert Heger.

The concerto is noted for its virtuosic and intricate piano writing, with Ravel's use of harmonies and timbres to create a diverse and emotionally expressive work. The piece is structured in three movements, with the second movement being a slow and lyrical section that showcases the pianist's ability to play with a range of dynamics and expressiveness.

One of the most distinctive features of the concerto is Ravel's use of the double basses, cellos, and contrabassoons to create a prominent bassline that supports the piano's melody and creates a rich and sonorous sound. The piece is widely considered a masterpiece of 20th-century music and has been performed by numerous pianists around the world.