I do not like the OSK hanging over the front of XXHE when I am setting a playlist or fiddling with settings.
In that case I'm afraid you don't know how to use it. I mean, you should use the horizontal bar type with all the Alt-keys and that is all. Besides that you use the keyboard provided by the app concerned and NOT the full fletched OSK "keyboard".
But if it doesn't work anyway ...
Please notice : This whole excercise is not a matter of trying to get a random "RDC" app to work; the real work is in the finding of the proper app. So if you just tried a first then the chance is around zero that will work. And this is what you are trying to accomplish.
As long as nobody else comes up with something better, it is TeamViewer. At last that works (and IIRC it also doesn't require the XXHE OSK for the alt keys - but not sure).
BUT
As said, TV is akward in fireing it up, although more possibilities exist for that which maybe nobody explored - at least not me.
Lastly, if I compare TV to the one I chose for Android, TV is nowhere. So just saying.
Btw, I used it with a W8 host so that sure works (or worked
). It is only that this W8 was not the audio PC itself, because that W8 used normal RDC to the audio PC which was W7 in my case. So, more complicated, but at least the tablet communicated with a W8 machine.
I will try using it myself again (direct to W8) because I planned that anyway. Will try the iPad too and see what's new these days.
Peter