How did B.B. King use his guitar Lucille to complement his singing?

B.B. King used his guitar, Lucille, to complement his singing through a technique of lyrical, single-string responses to his own impassioned vocal calls. This approach is a hallmark of the blues, where instrumental breaks are used to repeat, answer, or complement the vocal line.12

King’s guitar style was characterized by a distinctive vibrato, which allowed him to make his instrument "talk" or "speak" in a manner that mirrored the human voice. By utilizing these mournful melodic phrasings, Lucille effectively matched the lamenting tone of his vocals, as famously demonstrated in his signature song, "The Thrill Is Gone". This call-and-response pattern is deeply rooted in African musical traditions, where instruments are frequently used to imitate the rhythm and the rise and fall of words in language.12