It appears that T4 has a compatibility problem with the Audio Shield and the XPT2046 library. The library touch screen controller is hardwired to pin 11 for MISO and the audio adapter uses pin 11 for the audio clock. They don't want to play nice together. The library works fine with T3.6 but not with T4. It appears as though Touch Read is always true regardless of whether the screen is touched or not. Is anyone else having this issue and, if so, have you figured out a work-around?