by Scott Yanow In a change of pace, for this recording vibraphonist Cal Tjader recorded cool-toned bop without a Latin rhythm section. Half of the ten songs (mostly jazz standards) feature Tjader switching to drums (his original instrument) in a quartet also including the obscure trombonist Bob Collins, guitarist Eddie Duran and bassist Al McKibbon. Tjader is back on vibes for the quintet selections with tenor saxophonist Brew Moore, pianist Sonny Clark, bassist Eugene Wright and drummer Bobby White. He sounds right at home in both formats and the swinging quintet numbers in particular are a good reason to search for this valuable album.