Listen to Serenade for Strings in C Major, Op. 48: I. Forma di Sonatina online. Serenade for Strings in C Major, Op. 48: I. Forma di Sonatina is an English language song and is sung by Pittsburgh Symphony Orchestra and William Steinberg. Serenade for Strings in C Major, Op. 48: I. Forma di Sonatina, from the album 40 Essential Classical Songs, was released in the year 2014. The duration of the song is 9:40. Download English songs online from JioSaavn.