Thanks for the info, especially the explanation of why cardioid-pattern microphones are less bass-heavy. I did not know that that was why, though it makes a lot of sense. With just my home computer and Audacity, I have been unable to satisfactorily cut out enough bass from the recordings I make with my Core Sound Binaurals. Perhaps someone could steer me toward a program that incorporates a good equalizer that I could run the sound through post-recording. In my experience, cutting out the bass (what little was cut out by using my homemade battery-box through line-in) while making the live recording seemed a good idea. I should post a snippet of a recording so you can hear how rumbly and boomy it can be in one of the rooms that I record in. I had the good fortune to get the same seat twice (near a wall, even, for extra boom) and recorded first with no roll-off through mic-in, then with the battery box through line-in and the difference, while not profound, was noticeable. I am worried, as you mentioned, that I will cut out too much low-end, which cannot be repaired later, of course. I'm also worried that there's so much low-end without the roll-off that it will "muddy" the recording no mater what I do with it after it's recorded. It's a tough call. Maybe there's a plug-in for Audacity that permits adjustment of levels? I'm new enough to this that I just don't know...