Kenny Barron and Dave Holland are as good as it gets, but it's discipline that defines them

Not every duet is an "intimate" one. Pianist Kenny Barron and bassist Dave Holland, two of the finest musicians alive -- Barron is an NEA Jazz Master; Holland should be one -- have worked together for four decades. But there was little intimacy displayed Saturday night at the Kennedy Center's Family Theater, no knowing, across-the-stage-and-years glances. They focused on their instruments, and the music emanating from that focus was profound and masterly.