Violin Sonata (Strauss)

The Violin Sonata in E-flat major, Op. 18 was written by Richard Strauss between 1887 and 1888. Although not considered a milestone in violin literature, it is frequently performed and recorded. It is noted for its lyrical beauty and its technical demands made on both violinist and pianist. 
History.
Following the completion of his Cello Sonata and Piano Sonata, Strauss began working on his Violin Sonata in 1887, and finished it in 1888. It was during this time that Strauss fell in love with Pauline de Ahna, the soprano whom he would later wed, and his amorous feelings can be heard throughout the piece.
Structure.
Like all of his chamber music, Strauss' sonata follows standard classical form, though it is considered the last of his works to do so. The piece is in three movements, and takes approximately thirty minutes to perform:
The first movement opens with a brief piano solo, followed by lyrical violin interludes, through which the thematic material is presented.
This movement follows typical sonata-allegro form, and although it begins in a melancholy tone, the movement ends jubilantly.
The second movement is unique in that it is an "Improvisation"; that is, the tranquil violin passages give the impression of improvisational material. This movement maintains a beautiful singing tone throughout, and ends meditatively. It is in ternary form.
The third and final movement begins with a slow, methodical piano introduction which then leads into an exuberant "Allegro". After a rush of virtuosic passages from both performers, the sonata comes to an explosive end.
Notable recordings.
The earliest recording of the sonata was by Jascha Heifetz with pianist Arpad Sandor for RCA in 1934 (he went on to record it two other times, in 1954 and 1972 in his "final recital" with pianist Brooks Smith).