Hi,
Ultima Thule Parts 1 & 2
Oszillator Planet Concert on Ossiach Live
I have all the other albums and heard them ... I can safely say I have not heard these and am not surprised that their references are so low ...
As for Electronic Meditation, I really think that is not a "Tangerine Dream" album per se. It was much more indicative of some of the rock experiments in those days, when one thinks about the likes of Amon Duul (... and Edgar shutters probably ... and Klaus will trash them yet one more time!).
Everytime I hear some of it ... I'll be honest, I am less and less impressed with it. When comparing it to listening to Alpha Centaury or Atem, or Zeit ... now it's a whole other different ball game.
Preference? All of them or none! I love the "inner quietness" of Zeit and Alpha Centauri ... Atem was more "directed" in that you could see that the desire to experiment with sounds was now leaning towards creating familiar themes and souondscapes ... and side 2 of Atem, which wonderful and so beautiful as it is, is really not as open as the previous album ... I call it a "guided meditation" instead of a free form meditation as the previous albums were.
Mind you that the guys that played might not think so and figure that we're up our buns in inanity!