Schubert completed this serenade a few months before his death in 1828. It was originally the fourth song in the author's vocal suite "Swan Song", and was titled by the Viennese music publisher Haslinger. It refers to the saying that swans only open their throats to sing when they are dying, implying that this suite is the author's last work. "Serenade" was written by the author based on the poem by the poet Lehrstab, and is a well-known song. This "Serenade" has been adapted into an instrumental piece due to its beautiful and pleasant melody, and is widely loved by people. The song structure is a two-part form, with major and minor keys developing alternately. The first melody in D minor is light and graceful, with a soft and clear mood. It imitates the accompaniment of a guitar and shows a young man pouring out his love to his beloved girl. The first lyrics describe the quiet surroundings. This is followed by an 8-bar lyrical and peaceful interlude. The middle part of the second section switches to D major, using inflections. The change in tonality makes the emotions exciting and forms the climax of the whole song. The melody and rhythm at the end add new elements. As the closing sentence, which is mainly in D major and has a comprehensive tendency of major and minor keys, gradually fades from strong to weak, the song expressing love gradually fades away in the beautiful and quiet night.