Listen to Grand Duo Concertant in E-Flat Major, Op. 48, J. 204: III. Rondo Allegro online. Grand Duo Concertant in E-Flat Major, Op. 48, J. 204: III. Rondo Allegro is an English language song and is sung by Daniel Fuchs and Luc Fuchs. Grand Duo Concertant in E-Flat Major, Op. 48, J. 204: III. Rondo Allegro, from the album Carl Maria von Weber: Chamber Music with Clarinet (Grand Duo Concertant, Op. 48, J. 204 - Variations on a Theme from Silvana, Op. 33, J. 128 - Clarinet Quintet, Op. 34, J. 182), was released in the year 2013. The duration of the song is 7:29. Download English songs online from JioSaavn.