The EDID Control Switch allows you to choose between using the built-in EDID or detecting the EDID of the first HDMI output source. When EDID is on ‘TV’, the unit will detect the first HDMI output source’s EDID and record it in the unit. If the first detected output source is DVI it will pass to the next source, until the first HDMI is detected. The detection priority is HDMI v1.3 > HDMI v1.2 > DVI. When EDID is on ‘STD’, the unit uses the build-in EDID Video Support->1080p 12bit(max) Audio Support->PCM2.