I Walk the Line

The song "I Walk the Line" by Johnny Cash is in the key of A major. It was released in 1956 as a single by Sun Records and became Cash's first number-one hit on the Billboard country charts. Johnny Cash is both the performer and composer of the song. A trivia point is that the song features key changes between verses, which was unusual for popular music at the time. The melody is built on a steady rhythmic guitar pattern using a "boom-chicka-boom" style, with simple chord progressions and a vocal line that emphasizes sincerity and control.