I don't have their album Tangram and if I did that information probably would not be in the liner notes, so I am sorry that I can't help you.
BTW - I love your website and refer to it all the time. I like reading the reviews and your sense of humor. You have put an incredible amount of work into it and should be commended.
While we are on the topic - I have some of the early Virgin recordings on CD issued in the early 90's (Virgin Blueplate specials) I think. There are 2 box sets that have supposedly been remastered + there is another box set by Edgar Froese. Have any of you guys heard these sets ? Is the sound quality better than the earlier CD releases. Are they faithful to the original recordings ?
There was a thread on this subject a couple of moths ago – does anyone have any thoughts/new info? Are those Birotron choirs on Tangram? What about their early ‘80s albums?