I loaded up my iPod with some Fresh Air interviews with musicians in preparation for a recent road trip. I listened to Terry Gross interview Levon Helm about his Dirt Farmer and Midnight Ramble work, Earl Scruggs about bluegrass and some others. There were many clips of the music discussed. Lots of musicians were named during these interviews and credits were given before or after each tune, but I didn't hear even the standard "and on bass" line. Really. What gives?