18③ [Audio] => Night Mode: Compatible digital audiosoundtracks will be dynamically compressed. Turn on forgood dialogues even at low volume.Comfort : The bass level is limited to a comfort level.③ [Audio] => Digital Output: Select HDMI or SPDIF (Coaxialor Optical).④ [Video] => Aspect Ratio: Select a screen resolution. ④ [Video] => Brightness: Adjust the brightness level.④ [Video] => Contrast: Adjust the contrast level. ④ [Video] => TV System: Select one of the modes to bestsuit your TV.