Listen to Serenade No. 11 in E-Flat Major, K. 375: III. Adagio online. Serenade No. 11 in E-Flat Major, K. 375: III. Adagio is an Unknown language song and is sung by Reading Music Academy. Serenade No. 11 in E-Flat Major, K. 375: III. Adagio, from the album Study with Mozart – Greatest Classical Music for Concentration, Increase Brain Power, Focus on Learning, was released in the year 2015. The duration of the song is 2:33. Download Unknown songs online from JioSaavn.