Very close, but no cigar! As you might have figured out, this was a series of records/cd and the one you displayed was the last one, but don't let that stop you. Buy it!
The record I was referring to was "Test Record 1" in the series, "Depth of Image". Get all four if you can, they all serve a good purpose.
In looking at the Opus 3 site I notice that they had a CD with selections from Test Records 1, 2, and 3. As Test Record 1 had only about 40 minutes of materiel, you might get some excellent stuff from that one CD alone. I assume that it will be accompanied by a description of what you should hear with each cut - that is really helpful. Otherwise, its probably off to E-Bay.
Just to whet your appitite, on Test Record 1 they have a cut of a recorder playing in its upper registers - what a challenge this is to your system! Done wrong, your dog will commit suicide! The also have a cut with a group doing pan pipes and drums, and talking amounst themeselves while trying to do so (pan pipes are a bit difficult) - this was the cut that I said I could have walked in amoung the players. They also have a Swedish female singer which will help you with the amount of sibilence you should hear and the opening of the cut includes some out of phase notes which place part of the sound of the guitar far left of the left speaker (or it should if your speakers are set up properly), and a bass violin playing very clear very deep bass tones - or at least thats what you should hear!
Good luck in your quest........
