You can get an idea of what this stellar crew, with Anita O'Day and Roy Eldridge, really sounded like by way of these superb live airchecks/acetates from the Bob Bierman collection. Fascinating, alternate versions of Rockin' Chair (with the Bobby Byrne Orchestra!), an early, pre-George Williams version of American Bolero, and one-time verions of One O'Clock Jump, 12th Street Rag, Embraceable You and others. Bonus is a 1936, decidedly different version of Sing Sing Sing.