What do you do if the PA operator is also responding to your needs, reading that you need more and tweaking it up?
To an extent I leave most of my performers IEMs alone, but occasionally I’ll jump in on their behalf.
What would the app show if the levels behind it get changed?
What if I only change one of the three instruments behind the wheel?
What if you double tap and adjust something, does that map onto the magic wheel number?
I’m not saying it’s a bad idea, I can see what you want – I’m just not sure how it would be implemented…
I wonder whether it could of show two numbers – the highest and lowest send levels for your mix from the selected channels…
Would give you somewhere to aim for numerically, but also is easy to actually decide what it should be saying.