I posted a similar question several days ago and got no response, which I found odd. This is midi 101, and I'd be shocked if Line 6 overlooked this very basic function. I followed the advanced manual to the letter with regard to midi program change but it would not map - just follows sequentially no matter what program change info I enter. I got Line 6 tech support on the phone and spoke to a rather confused person who told me that "Line 6 is a very small company and there is no one here who is capable of answering your question - I suggest you refer to the Pod HD 500x Advanced Manual, or try the forums". To get that kind of response was, to say the least, a bit disappointing. I like the 500x, but because of lack of FX spillover I must use my Strymon Timeline and a Reverb unit after the output of the Pod. Proper functioning Midi mapping is needed badly.