I just found out one of my 1/8" stereo cables is open to the tip contact. I replaced it and the mirror image of my signal about the center went away. I'll bet that little devil was responsible for many of my anomailies along the way. Sometime I used it and sometime another, though until now, I never associated the ptoblems with the cable.
I've been trying to bring up my new Delta 44 with the interface kit. Now that I know about the reason for the mirrored image, when I saw a mirrored image on the Delta44 I went right to the interface kit. What I found is that there has to be 4 jumpers installed to connect the grounds on all 4 channels to the DB15 connector.