Hmmmm...that sound is quite evident on Harrier. On the big boys there's a room pressurization feeling even at realistic vocal amplitudes; a really concrete sense of venue that places the performers within it. It feels like it's surrounding you, with much to the rear.I have an assignment for you Pat. Play the highest res file of The Trinity Session you can find on your "latest greatest" (last I recall it was Ibis/Crusher/dual Pelicans?). Play it loud and tell me if you can "feel" the positive pressure of the HVAC system of the church. IE, the "flow of air through the HVAC vents". The sense of space and acoustics in that church are amazing. Or maybe its just me?
I'm not familiar with that recording but that is a fair amount of noise. Very pleasant stuff, though, we'll try it in the rotation and see if it takes root.
I've been noticing that on some of my fav swing era jazz recordings there can be a bunch of LF that I'm imagining that they were just not aware of, or didn't care, or couldn't avoid getting on the recording. Or maybe didn't expect to be reproduced by customers' stereos. Doors closing, footsteps, the building's elevator. It all adds to the sense that it's real.