There have been fifty years of jazz at Ravinia, and John McDonough has seen and heard virtually all of it. At many concerts, he brought along a portable reel-to-reel tape recorder, capturing undercover—now historic—recordings of many of the great jazz masters. Here are some tracks from his collection we bet you’ve never heard before:

Louis Armstrong
“Basin St. Blues”—July 27, 1960
Billy Kyle—Piano
Barneu Biggard—Clarinet
Trummy Young—Trombone
Danny Barcalone—Drums