I'm cheating a bit with the letter X and using the lovely Cole Porter song "Experiment." First, a recording by the divine Mabel Mercer. TWO pianists! Have you ever heard of such a thing. Her rolled Rs fill me with delight. The sound of her voice brings up a whole atmosphere, am I right?
And I'd never heard of this guy, Erik Leuthäuser, but what an adorable person!
And I'll close with someone else I've never heard of (oh, the treasures of YouTube), the woman to whom Leuthäuser was paying tribute, Irene Kral. This gal can SWING.