Fantasie on theme by Beethoven for flute and piano, Op.43

Franz Doppler (1821-1883) was a flute virtuoso and composer of Polish-Austrian-Hungarian heritage.
Born in Lemberg, then part of the Austrian Empire (now Lviv, Ukraine), in a family of a professional oboist and composer. His upbringing was inextricably linked to his younger brother, Karl Doppler. Both were trained primarily by their father. They emerged as child prodigies, forming a flute duo that would eventually become the most famous of the 19th century.
In 1838, the family moved to Budapest, where the brothers' professional careers truly began. They both were deeply influenced by the folk music of the region, which later provided the melodic material for his most successful works, such as the Fantaisie Pastorale Hongroise. By the age of 18, Franz was the principal flutist at the German Theatre in Budapest. He later moved to the Hungarian National Theatre, where he served as first flutist and eventually as an opera conductor. Both Doppler brothers greatly contributed to establishing the Hungarian Philharmonic Orchestra in 1853.
Franz and Karl toured Europe extensively from the 1840s through the 1850s. They were noted for their unique stage presence, performing on opposite sides of the stage (one playing right-handed, the other left-handed) to create a "mirrored" visual and sonic effect.
In 1858, Franz moved to Vienna to become the first flutist and conductor at the Court Opera (Wiener Hofoper). He eventually rose to the rank of Chief Conductor and was appointed a professor of flute at the Vienna Conservatory (1864-1867).
Doppler's music is the epitome of the 19th-century "Grand Duo" and solo style. His works are characterized by operatic lyricism, technical pyrotechnics (rapid scales, double-tonguing, and wide leaps), and a "Nationalist" flair. Additionally, he was a respected orchestrator. Most notably, he provided the orchestral arrangements for several of Franz Liszt’s Hungarian Rhapsodies.