What doesn't Francisco Ojeda know about Cuban music? Anyone can program a classic like "The Peanut Vendor" or the Buena Vista Social Club chestnut "Chan Chan." Almost anyone with taste can spin the latest masterpiece from pianist Chucho Valdes or reedman Paquito D'Rivera. But Cubanola, aired Tuesdays at 9:00 p.m. by WDNA-FM (88.9), is hard-core, digging into the deepest recesses of the seemingly boundless Cuban sound. Erudite host Ojeda has introduced new listeners to neglected masters like Bola de Nieve and unearthed truly obscure treasures like the unmistakable vibrato of New York-based Panchito Riset. True, sometimes there is more explication than music on the air, but that makes the listening richer once you've added Ojeda's selections to your own collection.