for Christmas I got a yamaha bought a Yamaha p125 and I own a iPad pro 12.9inch ucb c,..... I can get the garageband to record using garageband sounds from the p125...but I can't get garageband to playback the recorded sounds using my p125 instrument? I have tried toggling on and off all the c4 thru c6 keys for channels, local on off...etc...I am very concerned that the garageband won't send playback to my p125 instrument...it only recieves and plays only the garageband sound on playback?