We work with this sound guy and get along with him pretty well. But he always makes the keys inaudible in the mix. (We know because we record the shows.) I"ve asked him if he could bring them up. Even some of my bandmates have asked him. A couple of people at shows have told me, 'I see you playing (e.g., the piano parts in Roadhouse Blues), but don"t hear anything.'
So I finally asked him why he doesn"t make the keys audible in the mix. His response basically boils down to this: if you can distinctly hear the keys, that means their level is higher than that of everything else, and thus too loud. Instead, he insisted, the keys have to be 'balanced' in the mix, which means they should not be heard 'above' everything else, so you won't hear them distinctly. (Of course, I pointed out things like: when the keys can be heard, everything else could still be heard too, but to no avail.)
This is one sound guy"s take â perhaps some other sound guys also think this, given how often keys are mixed out, even at pro shows.