(From left): The Arcs’ Dan Auerbach and Richard Swift. Photo-Illustration: Vulture. Photos: Getty Images No one was more excited to hear “Only One for Me” than David Berman. After all, the swaying, melancholic ballad by rock-and-soul supergroup the Arcs was born from his old writing collaborations with the band’s founder, Dan Auerbach, who still remembers Berman’s enthusiasm for the song early on. “He was just really intrigued with what we were doing,” Auerbach says. “He was genuinely excited when I would take lyrics from him and work them into songs.” Years later, though, it remained in the vault. It’s not...