Ludwig van Beethoven’s Serenade in D Major, Op. 25 is a delightful chamber piece for flute, violin, and viola, later adapted for flute and piano and published as Op. 41. This flute duet arrangement is suitable for advanced players. The first flute part preserves the original flute part while incorporating elements from the accompaniment to create a fuller duo texture. Meanwhile, the second flute part condenses material from the violin and viola lines, ensuring a balanced and cohesive interplay between the two flutes.