Last up in this brief series looking at some of my favorite works for the horn from the 20th century (all included in my Canto CD) is the Sonata, Op. 24, by Trygve Madsen. This work was premiered in 1978 and was composed in homage to Franz Schubert on the occasion of the 150th anniversary of his death. Most notably, the last movement is based on a theme of Schubert which occurs twice in his piano works, in the middle movement of his Sonata in A minor (D. 537) from 1817 and in the finale of his Sonata in A major, D. 959, one of his last completed compositions (1828).
Movement I: Allegro
Movement II: Quasi menuetto
Movement III: Moderato, e poco rubato
Of course there are many other works from the 20th century that could be highlighted, these are merely the ones I voted for with my time (and money!) in recording them. For better audio quality do please check them out in a format better than YouTube, and also check out other horn recordings, there are many gems out there for the horn that other players like me have invested their time in to bring them to you — works just waiting to provide you with a needed break from the ongoing dramas of politics, Facebook, etc.