I think that the "roots music... roots music" sample is from a remix of Towers of Dub, but I'm not positive. I'll do some listening when I get back home from work, if I can confirm this before I see a definite answer on the list I'll write back.

On a related note, The Orb has inspired me to dig deep into the "Roots" of old school reggae and dub music. There aren't many types of music (maybe there aren't any) that have as much soul and feeling as roots reggae. I once read a statement made by Alex Patterson (not sure where it came from, or whether or not he actually said it) indicating that one of the reasons he began creating music was to open people's eyes to dub and reggae. I wonder how true this is. Can anyone confirm the source of this statement?