 "4-Track Guitar Music" was recorded in May 2010.It is an instrumental EP, with a similar sound to his first solo album, "Niandra LaDes and Usually Just a T-Shirt".The recording of the EP took place while Frusciante was (currently still is as of 2019) taking a full electronic direction of his music, saying this possibly with the release of his fifth EP, "Letur-Lefr", and stating this definitely with his ninth studio album, "PBX Funicular Intaglio Zone", and later albums and projects.