Yellowcard’s Sean Mackin on the history of the band and his violin

Long-running pop-punk act Yellowcard recently returned from a hiatus with a new album, When You’re Through Thinking, Say Yes. It’s the band’s first since 2007’s Paper Walls. In addition, the band is embarking on its first tour since a set of acoustic dates in 2008 and is playing the Beaumont Club on Tuesday, April 5, with All Time Low, Hey Monday, and the Summer Set. Yesterday, we spoke by phone with the band’s violinist, Sean Mackin, about the band’s evolution, its sound, and coming back after time off.