Tom, I haven't done that, except for sound scores, where I go back in and record sound effects on separate channels, but I take my grandkids to the circus every year, and the two kids that Ringling used the last few years worked with a sax, bass, guitar and drum. It was an awesome combination of tracks, additional horn parts (one keyboard) and sound effects/other embellishments (other keyboard). We were on a balcony directly over the pit, so I watched the group more than the tigers and lions.
Been working with a member of the University faculty on twin keyboard jobs. It's him on piano and me on synths, or me on B-2 and Rhodes and him on synths. We're going to start to integrate vibes into the act.
Worked "in the pit" with a 2nd keyboard at the Savoy Burlesque theater in Louisville years ago, but that was "a whole different "ball" game." "LOL"
Sorry!
Russ