Karl Doppler was a Hungarian flute

Western concert flute

The Western concert flute is a transverse woodwind instrument made of metal or wood. It is the most common variant of the flute. A musician who plays the flute is called a flautist, flutist, or flute player....

 virtuoso, conductor, music director, composer. He was the younger brother of the composer Franz Doppler

Franz Doppler

Albert Franz Doppler , was a flute virtuoso and a composer best known for his flute music. He also wrote one German and several Hungarian operas for Budapest, all produced with great success. His ballet music was popular during his lifetime.-Life:Doppler was born in Lemberg...

 and father of the composer Árpád Doppler

Árpád Doppler

Árpád Doppler was a Hungarian-German composer.He was born in Budapest, the son of Karl Doppler and he studied at the Conservatory of Stuttgart. From 1880 to 1883 he was a teacher at the Grand Conservatory in New York City, after which he taught at the Conservatory in Stuttgart. From 1889, he was...

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He worked until 1865 as music director at the Theater in Budapest, and from 1865 to 1898 as the Hofkapellmeister in Stuttgart. He composed several Hungarian operas, collection of Hungarian folk dances and choirs.