Listen to Piano Concerto No. 1 in D Minor, Op. 15: II. Adagio online. Piano Concerto No. 1 in D Minor, Op. 15: II. Adagio is an Unknown language song and is sung by Glenn Gould, Leonard Bernstein and New York Philharmonic Orchestra. Piano Concerto No. 1 in D Minor, Op. 15: II. Adagio, from the album Brahms: Concerto for Piano and Orchestra No. 1 in D Minor, Op. 15, was released in the year 1998. The duration of the song is 13:45. Download Unknown songs online from JioSaavn.