Tony,

I'm damned near blind in one eye, and can't see well out of the other, but I can some the wires running down the right leg of the keyboard and across the floor. And, if you look closely at the young lady playing the violin you'll see a flesh-colored headset mic that is used to pick up the violin sound as well. I suspect she is using a wireless mic that's running to a mixer somewhere off camera.

Be nice you old fart--it's Christmas Eve,

Gary