Listen to Violin Concerto in C, H.VIIa No.1: I. Allegro moderato online. Violin Concerto in C, H.VIIa No.1: I. Allegro moderato is an English language song and is sung by Rudolf Barshai and Moscow Chamber Orchestra. Violin Concerto in C, H.VIIa No.1: I. Allegro moderato, from the album 50 Essential Violin, was released in the year 2010. The duration of the song is 9:41. Download English songs online from JioSaavn.