Hello! 
  
But thats it ! 
Midifle Optimizer has no toughscreen  they say  therefore you need  the live pc player. 
So you need a Tablet PC + live PC Software + midifile Optimizer Software , that makes abouth 1000 €ros. 
  
If a midfileplayer is possible , then its just a case off adding the hardware and software. 
I have a Motif es with 6 outputs  , and I use 2 for Drums  , 2 for Instuments , and 2 for these Space sounds like chor and Strings. 
  
Played from Spaekers wide apart from each other. 
  
Its sounds like a live band , I play Acoustic gitar. 
  
I am a elektronic technician  but not a Programmer. 
  
Maybe you can help me , I also dont mind to spend some for your efforts . 
  
And I am sure there are many more people interesting in this issue . 
  
Greeting John van Bergem 
  
I am a dutchman so you can also write in   deutsche Sprache