 MGM sound engineer  Douglas Shearer  (qv) takes us for a behind the scenes look at how the sound portion of a talking picture is created. Uses _Bitter Sweet (1940)_ (qv) (a  Jeanette MacDonald  (qv) and  Nelson Eddy  (qv) picture) and _Comrade X (1940)_ (qv) to illustrate the techniques. Parts of this short are in Technicolor, including a stunning screen test of  Greer Garson  (qv) for _Blossoms in the Dust (1941)_ (qv). The conclusion is a montage of trailers for coming MGM pictures featuring almost the entire MGM constellation of stars.