Roger McGuinn is an American musician known for his role as the lead vocalist and guitarist in the influential rock band, The Byrds. His signature 12-string Rickenbacker guitar sound played a pivotal role in the development of folk-rock and country-rock genres, particularly in the mid-1960s. McGuinn is credited with popularizing the jangly, electric folk sound that became a distinct feature of The Byrds' music. His rendition of Bob Dylan's "Mr. Tambourine Man," with The Byrds, is an iconic example of his influential work.