With any new band, there is an adjustment period. Musicians need time to learn each other’s quirks and reach a level of musical communication bordering on telepathy. But local indie folk trio Cardinal Sons are not a “new band” in the traditional sense of the term. “When you start a band, there’s always give-and-take of getting comfortable with people and being around each other,” says drummer Dave Shirley, “but since we’re brothers, we’ve always been around ea...