public void setPassthroughControl(String passthroughControl) {
        this.passthroughControl = passthroughControl;
    }
When set to whenPossible, input DD+ audio will be passed through if it is present on the input. This detection is
dynamic over the life of the transcode. Inputs that alternate between DD+ and non-DD+ content will have a
consistent DD+ output as the system alternates between passthrough and encoding.

@param passthroughControl
       When set to whenPossible, input DD+ audio will be passed through if it is present on the input. This
       detection is dynamic over the life of the transcode. Inputs that alternate between DD+ and non-DD+ content
       will have a consistent DD+ output as the system alternates between passthrough and encoding.
@see Eac3PassthroughControl
aws-java-sdk-medialive/src/main/java/com/amazonaws/services/medialive/model/Eac3Settings.java