E2-E4 is a solo recording by German musician and Ash Ra Tempel founder Manuel Göttsching. Released in 1984, the album consists of one minimalistic, hour-long electronic track that Göttsching recorded in one take using a sequencer, with improvised keyboards, metallic percussion, and guitar playing.
The album is named after the most popular opening chess move 1. e2-e4 (which is expressed in long algebraic notation). A noteworthy pun on E2-E4 exists—when expressed in standard scientific pitch notation, the harmonic range of a guitar's strings extends from E2 (82.407 Hz) to E4 (329.63 Hz).