I used REW last night, and have added 4 filters to my BFD - and according to the new plots, it does look a little better. However - there were a few things I didn't do and I plan to do it again over the weekend "properly". But I have a few of questions : 1) I didn't load the correction values for the SPL. HTS seemed to suggest wild varations between RS SPLs and that the correction values might not make much sense anyway. But do people usually load them? 2) I didn't calibrate the soundcard - because I couldn't. The plot was clearly a feedback loop. The help file mentions my card (Creative Labs Audigy 2ZS) and says I need to disable some advanced monitor recording setting. But I can't find it! Has anybody done this? 3) I've seen some comments about using main speakers as well as the sub. Should I? 4) I can use the filter to get rid of the peaks - but I have quite a big dip at about 78Hz. How do I get rid of that?