Listen to Clarinet Quartet in E-Flat Major, Op. 1: I. Allegro moderato online. Clarinet Quartet in E-Flat Major, Op. 1: I. Allegro moderato is an English language song and is sung by Wenzel Fuchs. Clarinet Quartet in E-Flat Major, Op. 1: I. Allegro moderato, from the album Rabl: Chamber Music, was released in the year 2016. The duration of the song is 6:38. Download English songs online from JioSaavn.