Serenade for Strings Op. 22 was composed by Antonin Dvo ák in just 12 days in May 1875... I chose to use the shade of fa maggiore to make the flute part more "flute" both from a technical point of view and from the sound effect. The Serenade for strings op. 22 was composed by Antonin Dvo ák in just 12 days in May 1875... I chose to use the key of F major to make the flute part more "flutistic" both from a technical and sound effect point of view.