Amazingly and inevitably, the directions to the new SF Jazz Center are the same as those countless have taken to get to NYC’s Carnegie Hall: “Practice.” And that got us wondering. A year ago “12-year old trumpet sensation” Gabriel Angelo started to blow up, with appearances on Ellen and this SF Chronicle video feature. He started a new blog off by setting bold practice time goals (that he’d presumably meet out on bustling Market St corners), scored a Yoshi’s gig, even. Still, I’d imagine he needs to put in a lot more woodshedding before we’d see him move on up to this instant crown jewel of west coast jazz venues. But it would be a blast to be proven otherwise.