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 Instrumental language song and is sung by Rudolf Barshai Studio Orchestra. Symphony No. 1 in C Major, Op. 21: I. Adagio molto - Allegro con brio, from the album Rudolf Barshai: Symphonies by Ludwig van Beethoven, was released in the year 2014. The duration of the song is 9:30. Download Instrumental songs online from JioSaavn.