This is the first of two long-buried broadcasts from Seattle, featuring pianist Ahmad Jamal at the pinnacle of his art. It captures Jamal with drummer Chuck Lampkin and alternating bassists Richard Evans and Jamil Nasser. (Evans wrote “Minor Adjustment,” “Bogota,” and “Keep on Keeping On.”) It’s as much a must-hear as the numerous archival releases around this time from Jamal’s piano contemporaries Erroll Garner and Bill Evans. Cole Porter’s “All of You” puts one in mind of Miles Davis, who’d been playing the tune for years, heavily influenced by Jamal’s swinging lyricism and restraint. The Gershwins’ “But Not for Me” appears as well, harking back to At the Pershing: But Not for Me, Jamal’s 1958 breakthrough, among jazz’s all-time essential recordings. There’s one Jamal original (“Minor Moods”), a ripping Rodgers & Hart opener (“Johnny One Note”), and a couple of fabulous obscurities in Johnny Hodges’ “Squatty Roo” (a variant on “I Got Rhythm”) and a transformed easy-listening number of the period, “Lollipops & Roses.” The midtempo cooker “Tangerine” is a concise distillation of Jamal’s style: highly virtuosic, relentlessly grooving, and painting well outside the lines in terms of form and arrangement.