Soul blues is a style of blues music developed in the mid 1960s that combines elements of soul music and R&B.. Origin. African American singers and musicians who grew up listening to the electric blues by artists such as Muddy Waters, Jimmy Reed, and Elmore James, and soul singers such as Sam Cooke, Ray Charles and Otis Redding fused blues and soul music.
Philadelphia soul, sometimes called Philly soul, the Philadelphia sound, Phillysound, or TSOP (The Sound of Philadelphia), is a genre of late 1960s–1970s soul music characterized by funk influences and lush instrumental arrangements, often featuring sweeping strings and piercing horns.
Peter Guralnick, Sweet soul music. Il rhythm'n'blues e l'emancipazione dei neri d'America, Arcana Editrice, 2009; Eddy Cilia, Soul rhythm & blues. I classici, Giunti Editore, 2010; Alberto Castelli, Soul to soul. Storie di musica vera, Chinaski Edizioni, 2019; Antonio Bacciocchi, Soul. La musica dell'anima, DIARKOS, 2022