Listen to Puccini: Madama Butterfly, Act II: Coro a bocca chiusa "Humming Chorus" online. Puccini: Madama Butterfly, Act II: Coro a bocca chiusa "Humming Chorus" is an Italian language song and is sung by Wiener Staatsopernchor, Wiener Philharmoniker and Herbert Von Karajan. Puccini: Madama Butterfly, Act II: Coro a bocca chiusa "Humming Chorus", from the album Puccini for Lovers, was released in the year 2023. The duration of the song is 2:59. Download Italian songs online from JioSaavn.