Two tracks from an old mix.
"The house of illusion" I did a wide search but couldn't find anything with that name - solved! by Fernando R = Unity Mixers - House Evolution (Reel Techno Mix)
"Synergy" again did a search could not find anything - really interested in finding this one - solved! by Fernando R = SFX - Monster Mania
Please also see below for 2 more:
"Reverse" - nice techno tune with a twist at ~30 sec in - solved! by Fernando R = LX Emoire - Unequal Chord
"Dub" - some undecipherable words - solved! by Fernando R = 3rd Electric - Hydro-Galactica
Tracks are from late `91 or early `92
Thanks!