Scribz Riley’s warm, enveloping hip-hop/R&B productions are packed with tiny details. The Grammy-winning East London producer creates a patchwork cloak of supportive sound: his intricate bass and soothing washes of reverberant synths add a melancholy tug to the voices of his collaborators, whether it’s a righteous Cardi B, a lovestruck Khalid or a devil-may-care J Hus.