E2-E4 the first ever techno music. In December 1981, Manuel Göttsching (now 65) was due to fly from his native Berlin to Hamburg. In need of some music for his Walkman, he decided to record an idea that he was working on. Thirty-two years later, the reverberations of his work in Studio Roma that Saturday evening are still being felt. In terms of modern dance music's DNA, the hour-long piece that he produced, E2-E4, is as important as any disco, funk or Kraftwerk record. Recorded in one take, with Göttsching improvising keyboards and noodly guitar over its insistent synthesizer patterns and metallic percussion – a process made possible by the recent advent of the sequencer – E2-E4 distilled the classical minimalism of Terry Riley and Steve Reich into a groove that became a Paradise Garage anthem. In 1989, it was rebooted by Italians Sueño Latino as a rave era chill-out classic.