Big Ideas, the second foray into folk-rock from local singer-songwriter Joel Kraft, is both authentic and refreshingly hard to pin down. Kraft’s songs, for the most part, fuse clean, inventive harmonies to partly cloudy lyrics. The album opens with the upbeat “Something’s Got to Break,” a number that smacks of Jonathan Richman’s touch and throws a trumpet into the effortlessly quirky mix. But then he slows it down with “Eow,” a more traditional folk tune that’s sweet and delicate enough to elicit a sniffle or two. Big Ideas packs so many easy feelings that Kraft seems to have put it all out there without a thought as to how cool or nuanced his songs actually come across. Fortunately for us — and him — the results are pretty damn brilliant.