Rostam Batmanglij has a sometimes lengthy songwriting process. The former member of Vampire Weekend can sometimes work up a concept and then revisit it and revise it months and months later.
In the case of “Gwan,” his most recent single, Rostam drew it up as sheet music some time ago before sitting down to refine it. Now it’s one of his favorite songs to play live. And play it live he did to an attentive gathering at 9:30 Club on May 2.