Ludwig van Beethoven (1770 – 1827) was a German composer and pianist. Beethoven remains one of the most admired composers in the history of Western music; his works rank among the most performed of the classical music repertoire and span the transition from the Classical period to the Romantic era in classical music. His career has conventionally been divided into early, middle, and late periods. His early period, during which he forged his craft, is typically considered to have lasted until 1802. From 1802 to around 1812, his middle period showed an individual development from the styles of Joseph Haydn and Wolfgang Amadeus Mozart, and is sometimes characterized as heroic. During this time, he began to grow increasingly deaf. In his late period, from 1812 to 1827, he extended his innovations in musical form and expression.

Beethoven was born in Bonn. His musical talent was obvious at an early age. He was initially harshly and intensively taught by his father, Johann van Beethoven. Beethoven was later taught by the composer and conductor Christian Gottlob Neefe, under whose tutelage he published his first work, a set of keyboard variations, in 1783. He found relief from a dysfunctional home life with the family of Helene von Breuning, whose children he loved, befriended, and taught piano. At age 21, he moved to Vienna, which subsequently became his base, and studied composition with Haydn. Beethoven then gained a reputation as a virtuoso pianist, and was soon patronised by Karl Alois, Prince Lichnowsky for compositions, which resulted in his three Opus 1 piano trios (the earliest works to which he accorded an opus number) in 1795.

Piano Sonata No. 13 in E-flat major, Op. 27 No. 1, "Quasi una fantasia", is a sonata composed by Ludwig van Beethoven in 1800–1801. He was about 30 years old when he wrote the sonata. He had already made a name for himself in Vienna as pianist and composer and was beginning to explore alternatives to the classical-era compositional procedures that he had largely adhered to during the 18th century. The most famous works of his "middle period", often emphasizing heroism, were yet to come.

"Sonata quasi una fantasia" translates to "sonata in the manner of a fantasy". While we cannot know precisely why Beethoven used this description for the two Op. 27 sonatas, several explanations are available. In the case of the present work (though not its companion), the entire sonata is played continuously without pauses between movements, in the manner of most fantasias. The movements are not in the usual order for a sonata: the opening movement is a slow movement and the scherzo and slow movement are in inverted order. The first movement is not in sonata form, as is true for most sonatas. As Kenneth Drake has pointed out, the movements are in extreme contrast with each other, a common trait of the sections of a fantasia. Lastly, the appearance of a quotation from one movement within another (here, from the third movement within the fourth) is a form of freedom not ordinarily employed in classical sonatas.

Source: Wikipedia (https://en.wikipedia.org/wiki/Piano_Sonata_No._13_(Bee thoven)).

Although originally written for Solo Piano, I created this Arrangement of the Piano Sonata No. 13 in Eb Major (Op. 27 No. 1) for Flute & Piano.