Listen to Liszt: Piano Concerto No. 1 in E-Flat Major, S. 124: I. Allegro maestoso online. Liszt: Piano Concerto No. 1 in E-Flat Major, S. 124: I. Allegro maestoso is an Unknown language song and is sung by Martha Argerich, London Symphony Orchestra and Claudio Abbado. Liszt: Piano Concerto No. 1 in E-Flat Major, S. 124: I. Allegro maestoso, from the album 50 Piano Masterworks, was released in the year 2015. The duration of the song is 5:07. Download Unknown songs online from JioSaavn.