Either source you use for adjustments, you will have to check what mode the DVD player is using, i.e., Cinema, Standard, Vivid, etc. That will make a difference to what you see on your monitor. I usually set my DVD player to Standard, then run Avia. Also check if you have a black level adjustment on your DVD player. It needs to be set correctly if your TV has only global adjustments for the rest of the inputs, which could definitely affect your normal TV viewing.