Listen to Cello Concerto in A Minor, Op. 129: II. Langsam online. Cello Concerto in A Minor, Op. 129: II. Langsam is an Instrumental language song and is sung by Mstislav Rostropovich, Gennady Rozhdestvensky and Leningrad Philharmonic Symphony Orchestra. Cello Concerto in A Minor, Op. 129: II. Langsam, from the album Schumann: Cello Concerto, Op. 129, was released in the year 1963. The duration of the song is 5:03. Download Instrumental songs online from JioSaavn.