I just want to know if it's possible to do program changes to a 2nd app ( Audio Evolution Mobile) on the same Android device (7.1.1 tablet)
The reason I ask is because eXtream Software Development has provided their own midi and audio drivers for Android devices SOLVING the latency problems found on the android platform. So I can use their midi instrument tracks to play the wireless keytar live. The only thing they need to do now is move past sf2 to VSTs.
So - can I control the midi Program Change in their app with BandHelper?
78^)
Sending MIDI between apps on the same device is called Virtual MIDI. This should work on Android, but I don't remember if I've ever tried it. My app should be ready, but the other app you're communicating with would also have to implement virtual MIDI.
In Project/Settings/Apps/ below Name there is a text field for Package - what should I input there to try and bridge the apps?
That function is unrelated to MIDI. You don't need to do anything with it.