Listen to Humoresque Poco lento e grazioso G flat major online. Humoresque Poco lento e grazioso G flat major is an English language song and is sung by Rudolf Firkusny. Humoresque Poco lento e grazioso G flat major, from the album Instant Classical Culture, was released in the year 2010. The duration of the song is 1:13. Download English songs online from JioSaavn.