Trying to hook up a soundbar to my DCX3200 using the optical spdif but am only getting a static/popping sound. The soundbar only accepts a pcm stream on the optical input. The DCX3200 is supposed to support pcm but I cannot find a setting anywhere to change it. Looking through the forums and articles I see that the HD guide boxes have a setting for HDMI/Auto, pcm, or Dolby Digital. This is not the HD guide box though.