Sat., May 9 at 6:30 pm (and available on demand for one week): Bluegrass Signal continues the Live At KALW series with old time music from the Stairwell Sisters in their formative days (Feb. 8, 2003), the Crooked Jades during a recent series of concerts (May 27, 2017), and Ray Bierl before a celebration of Woody Guthrie's songs (April 7, 2018).