Ok, first, here's the startup-sequence of the Cascade Megademo:
0 ; CASCADE IN 12/1988
3 ; --- CASCADE MEGADEMO 1 ---
4 ; CODED IN 1988 BY DISTANCE!
5 ; ENJOY THE SHOW !!!
7 ; MEMBERS OF CASCADE GERMANY ARE:
8 ; BRUCE & BONGO
9 ; DISTANCE
; THE SOUNDWIZARD
; MEMBERS OF CASCADE FRANCE ARE:
; THE LITTLE GUY
; CASCADE DK IS SLEEPY SLEEP
So, no, Cascade isn't a German group. Well, it's no a German only group.
From the part 6 of the same Megademo :
MEMBERS OF CASCADE 1733 ARE : BRUCE & BONGO & CRACKLINE & DISTANCE & SOUNDWIZARD FRENCH MEMBERS ARE: SKATEMASTER - THE LITTLE GUY - BLACKKING (.......) ALSO HELLO TO OUR DANISH MEMBER: SLEEPY SLEEP
If you can now tell me where this is a different group ... .
I'll try to locate some earlier prods by Cascade. This Megademo 1 is the first one coded by Distance, who just joined up.