Read this: "I would rather die than fake a song": Inside the revolutionary success of twenty one pilots’ Blurryface
"We always discussed releasing an album of twenty one pilots lullabies, but for some reason it always evaded us," says Casey. "It only took seven-plus years of making these albums for it to finally happen."
Detailing how they adapted twenty one pilots' genre-hopping material, Casey continues: "When you break these songs down to their bare bones, you can definitely hear how hauntingly beautiful Tyler [Joseph, frontman]'s melodies are.
"Some of these songs were a challenge to transpose. In songs like Ride and Heathens where the melodies are rapid-fire, we had to simplify them."
Stream Babyface below, and see everything else they've turned into lullabies – including YUNGBLUD, Foo Fighters, blink-182 and Paramore – over at sparrowsleeps.com.