Listen to Proposta Seria, Adagio online. Proposta Seria, Adagio is an English language song and is sung by Janáček Philharmonic Orchestra and Theodore Kuchar. Proposta Seria, Adagio, from the album Nielsen: Complete Symphonies, was released in the year 2012. The duration of the song is 6:05. Download English songs online from JioSaavn.