Thanks for that, good news at last :) Upon further digging I'vbe discovered that I'll need three indepentent cores on three midi in/out ports to have my pots too (needs 102 pots, 15 sliders, 56 buttons and 56 leds not including meters), is that right? Hang on.. just thought, if I'm having 102 pots and 15 sliders.. will I need 4 core modules?? Yikes.. If that's right, I just need to know if I can bump up the number of LEDs on my meters to 20 from 16. If they run on a voltage comparason I guess it is with modification to the code.. wow, I'm starting to look at what I've written and not know what I mean! Man being a musician in the 21st century is hard work! Thanks again! -Joel