Knowles first got bitten by music when, at age 11, his dad put on Dire Straits’ “Sultans of Swing.’’ He recalls, “That made me want to play.’’ And by plundering his dad’s records, along with an older sister’s Blues Collection magazines which came with cassette tapes, Davy was able to hear everyone from Chuck Berry and Muddy Waters onward. He soon grew to love Cocker (“my mom grew up in his same town of Sheffield and she’d bump into Joe’s mom all the time’’) and, especially Rory Gallagher, who...