Historian Peter Guralnick examines the evolution of Otis' signature sound:“He was at that point very much of a Little Richard imitator and Sam Cooke admirer, though on the second side, the ballad, there is evidence of that patented quaver in his voice, the strained sincerity that was Otis Redding’s mark. Jim Stewart though it was nervousness at first.” –Peter Guralnick’s “Sweet Soul Music”