[2] Tom Petty and Mike Campbell recorded I Should Have Known It on January 7, 2010 at The Clubhouse in Los Angeles.
Petty's long-time lead guitarist Mike Campbell told Jam!
Music that the blues-based album where the single was included was inspired by the sound of his recently acquired sunburst '59 Les Paul.
There's just something about the harmonic overtones in it when I picked it up and plugged it in, it immediately had that classic British blues sound.
Although Petty often played an extra guitar during the song, he was only credited for vocals and several percussion instruments.