unfortunately, I am very bad at making videos for an international audience, as you can see here and here
Moeover, I speak English like a German Holstein, so I had to spend too much time to make subtitles manually due to the fact Google Interpreter is very bad at German Holstein speech 
Anyway, you can see the Carlos video: if you understand it, you just have to duplicate the process adding another couple of Scaler + MIDI polysher and using the latter to transpose and listen, just as I did