Listen to Tosca, Act 3: O Dolci Mani online. Tosca, Act 3: O Dolci Mani is an English language song and is sung by Ragnar Ulfung. Tosca, Act 3: O Dolci Mani, from the album Great Swedish Singers: Ragnar Ulfung, was released in the year 2009. The duration of the song is 7:37. Download English songs online from JioSaavn.