OK, I’ve learned something and I’ve come back to share, thanks to this thread.
The add-on/app mentioned there (AUM) may just replace the digital mixer hardware i posted in another reply in this thread…I’m guessing it depends on how iOS sees the Rane One - if it’s just a controller, ignore me…but if iOS sees the Rane One as an audio interface with ins and outs as well as an integrated control surface…Bob’s your uncle 
