It must be a miracle. Now Rekordbox works. Just you saying it made it work. I didn’t change anything. Maybe turning it off and on realigned everything for some reason. Cause now it works. I’m beside myself. Thanks for speaking connection into my set-up. Ha ha. So for those with the same problem I set it all up according to this link:
and tried to record YouTube and my controller with Rekordbox at first in which they both played but I could only record YouTube. Then I tried to record YouTube and Itunes and it worked. I don’t know how, but I turned off my computer then on and it worked. Magic. Thanks Bill and whoever else helped me on this thread.