PBX Funicular Intaglio Zone is the eleventh solo album by John Frusciante, released on September 12, 2012 in Japan, and on September 25, 2012 internationally on Record Collection. The album was released in multiple formats, including CD, vinyl, 32-bit digital formats and cassette.Self-produced by Frusciante, the album was preceded by the EP Letur-Lefr (2012) and the free download "Walls and Doors".