This goes to show that many problems users face when performing
digital signal processing.
As you point out, when you used MTU's Vogone and Keyrite digital signal processing programs,
all worked correctly as expected.
When you used your own key changer, it also worked properly. However, when you used an unknown key changer there were unexpected poor results. Go figure!
The only way to know for sure is to test on the target machine before getting on pickled on stage.
