Partners Monique Byrne and Andy Rogovin were married with kids before they ever sang together, but as soon as they began spinning their soprano and tenor voices into gossamer harmonies, they knew they were on to something special. As the duo Crowes Pasture, they’ve captured their beautiful vocal blend — woven into delicately textured arrangements featuring his guitar and her clawhammer banjo — on two EPs and three albums, and on Sept. 1, they’ll release their fourth full album, Don’t Blink.