To the midi experts.... I have a Gem RPX Piano hooked to my Tyros 4... Every time I make a change to the T4 it reduces the volume on the Gem Module.... I have to select another preset and then go back to my original preset and the volume is back... SO if I am using preset number 89 I have to go up one or down one preset and back to 89 and it will be back at original volume...Any thoughts or ideas would be appreciated...thanks Ron