I plan to add a subwoofer to my system in the very near future but I am unsure how to adjust my system using Video Essentials. I haven't actually used it with an SPL meter but I plan to do so when I add the sub - but I'm not sure how to use one! What exactly does the process involve? It may sound like a stupid question but I don't really know how to adjust my system - my DVD player has a built in Dolby Digital decoder and for the settings you just specify the distances of the speakers from the listening position. How does this relate to delay times etc? Do I just keep fiddling with the settings until ... well, until what? Until the readings on the meter are equal for each speaker? But what about the subwoofer? Surely that shouldn't give the same reading? I'm quite confused about this matter, so I would be grateful if someone could explain exactly what I have to do. I've had a look at some web sites but they are a bit too technical - I just want to know the basics!