SIMON: Of course, we couldn’t resist playing “Edelweiss,” either. A number of listeners wrote in to point out that Christopher Plummer doesn’t really sing in “The Sound of Music” – although, of course, he’d played Captain Von Trapp. PLUMMER: They did for the long passages.Click to see full answer. Consequently, who did the singing in the sound of music?Christopher Plummer’s singing was dubbed by Bill Lee of the singing group The Mellomen. Two years before the musical made its Broadway debut, Paramount Pictures bought the rights to the Von Trapp Singers story, intending to cast Audrey Hepburn as Maria.Likewise, how old was Christopher Plummer in The Sound of Music? The Robert Wise-directed film, which also starred Julie Andrews, went on to become an iconic piece of work. At the time of release,Plummer was 36-years-old. In this way, did the actors sing in Sound of Music? Charmian Carr refuted the claim that the voices of the child actors were dubbed in the film and on the soundtrack. Carr contended that all of the children who are in the film sing on the track, but four other children were added to most of the songs to give them a fuller sound, they did not replace them as singers.Is the sound of music historically accurate?The Von Trapp family singing in a radio show in London. And the story it is tells is a true one — up to a point. The film was an adaptation of the 1959 Rodgers and Hammerstein II musical of the same name, which itself was based on Maria von Trapp’s book The Story of the Trapp Family Singers.