I actually bought that preset hoping it would fit my need and it’s awesome, but to an extent. It uses 4 note generator and frequency, which I have the tools to find the notes and stuff, but I can’t get the octaves right and those all sound the same somewhat.
see what is going through my mind is this. I want to take some program on iOS or Mac that lets me make a piano or keyboard chord virtually and Somehow play back the chords like the video and link you linked, using the helix foot switches. Some programs that pop into mind are garage band, MainStage 3, but I don’t know if those are the tools I need to do this and how to do it.
good deal on question 1 thank you!