Listen to Symphony No. 1 in C Major, Op. 21: I. Adagio Molto - Allegro Con Brio online. Symphony No. 1 in C Major, Op. 21: I. Adagio Molto - Allegro Con Brio is an English language song and is sung by Arturo Toscanini and Bbc Symphony Orchestra. Symphony No. 1 in C Major, Op. 21: I. Adagio Molto - Allegro Con Brio, from the album Best of Classical Music, was released in the year 2014. The duration of the song is 8:29. Download English songs online from JioSaavn.