It's pretty incredible each year.
Here's a PBS Newshour segment about the 2015 one
(
Kronos,
Terry Riley, et al.) - and you can see
highlights and street scenes of others on YT too.
Still a bit early for more '17 highlights, I think.
the guy on the left is
Terry Riley's son
Gyan and the drummer is
Glenn Kotche from
Wilco.
...and a short vid of
Henry Grimes who had
Nicole Mitchell (!),
Tomeka Reid (!!), and
Warren Smith (!!!) with him.
I'm sure there'll be more as the days pass...