OK - The Farfisa G7 could do that. We were a dealer for the line a few years ago, and probably sold more G7's than anyone else.
BTW - I think John Tesh is a terrific musician. He's a Julliard grad, and he surrounds himself with huge orchestras that make a lush wall of sound. I also had the pleasure of seeing Yanni "live" in the same week as I saw the Philadelphia Orchestra a few years ago, and although the styles are completely different - they were both AWESOME. I'd kill just to have his speaking voice....and that violinist that travels with him - what a monster.
Give a serious listen, and you'll find alot to admire. It's best appreciated in concert, rather than in the background while you're doing other stuff. I became a fan AFTER the show.