With his third solo album, Truly…, underrated keyboardist Jim Beard further shows that groove-jazz doesn’t have to be inane. Here, Beard mixes warped, catchy tunes with clever arrangements and tasty solos, and caps it all off with a whacked-out epic, ”Major Darling’s Impossible Halftime Show,” which bows to both Esquivel and Steely Dan. A brainy party favor. A-