in the "roller" style (incorporating lots of drum rolls, etc.) the loop
*has*
been sped up, usually. the thing is, if you have a lot of bottom end in
your
drums, then you have to minimize the amt. of bottom end in the bassline--if
you want your track to not come out muddy. the basslines in jungle/d&b are
usually more of the "groove element" than the drums (kinda like in dub) so
reducing the lo-freq. content is counter-productive, hence the lack of
"bottom end" in the drums. in the "stepper (aka 2-step)" style, the break
is
usually programmed (i.e., *not* based on a drum loop) and consequently isn't
pitch shifted--though you still need to make sure the bass & drums aren't
fighting for the same frequency ranges.
i'm not sure what the deal is with the lights, though...
-t
p.s. i didn't like drum & bass/jungle the first time i heard it either...
i
think i scrunched up my face and said "what is that?"