Ratatat is a New York City electronic music duo consisting of guitarist Mike Stroud and synthesizer, bass player, and producer Evan Mast. LP4 is the fourth studio album by Ratatat.The name comes from the acronym for long play (LP), with the '4' indicating it is their fourth album.

LP4, is the duo's next step forward on the work that they began on LP3. It was conceived during the creative streak that began during the LP3 sessions at Old Soul studios, in rural Upstate New York. The band describes LP4 as a 'weirder' album than LP3, with a much braver approach to the arrangements. There are more instruments featured on the record than ever before, and for the first time a full string section.

The album also features a number of spoken word interludes, one taken from Werner Herzog's film STROSZECK in which the lead character Bruno S describes the keyboards he owns. The other samples are all courtesy of Linda Manz, the cult American actress who has worked with Terrance Mallick (DAYS OF HEAVEN) Philip Kaufman, Dennis Hopper (OUT OF THE BLUE) and Harmony Korine (GUMMO).