public Eac3Settings withSurroundExMode(Eac3SurroundExMode surroundExMode) {
        this.surroundExMode = surroundExMode.toString();
        return this;
    }
When encoding 3/2 audio, sets whether an extra center back surround channel is matrix encoded into the left and
right surround channels.

@param surroundExMode
       When encoding 3/2 audio, sets whether an extra center back surround channel is matrix encoded into the
       left and right surround channels.
@return Returns a reference to this object so that method calls can be chained together.
@see Eac3SurroundExMode
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/Eac3Settings.java