Hi there, thank you very much for your clear explanation! I tried it out, following your guidelines, but unfortunately
it did not work correctly with this signal. The Harpex (on the 5.1 group track with the 4.0 childbus inserted as you suggested) showed only two
signals in its Input channel display, while it should be four. Unless I misunderstood something, of course.
On the other hand, the people at Harpex told me to just insert the quad audiofile (with the WXYZ source audio) onto a 5.1 track which had the
Harpex inserted. I tried that, and it worked! I am not technical enough however to understand the logic behind this, I readily admit…
But cheers anyway!