Abba's Björn Ulvaeus talks about reuniting with the band after a 40-year hiatus for the release of its ninth and final studio album, Voyage. NPR music critic Jewly Hight unpacks the history of the Grand Ole Opry and where its legacy stands today. DJ Skratch Bastid and classical violinist Andrew Forde explain why their upcoming collaborative concert at Toronto's Koerner Hall isn't as unlikely as it may appear.