Perhaps a simple question to many of you. I have just bought a DV-757Ai moving the older DV-737 to another room. My A/V amp is a Denon AVR-3801 fully set up and calibrated with speaker distances, channel levels and time delays. (sound pressure meter has been used). Using the analorginputs of the 757 for DVD Audio I connect to the external input on the Amp. Do I really need to set up the speakers through the 757 audio menu again? The AVR seems to be applying the same levels also for the extrenal input as set up for the rest.