Evening Star Fripp & ENO.

In 1972, Eno and Robert Fripp (from King Crimson) used a tape-delay system, described as 'Frippertronics', and the pair released the proto-ambient album (No Pussyfooting) (1973). The technique involved two Revox tape recorders set up side by side, with the tape unspooling from the first deck being carried over to the second deck to be spooled.

This enabled sound recorded on the first deck to be played back by the second deck at a time delay that varied with the distance between the two decks and the speed of the tape (typically a few seconds). The technique was borrowed from minimalist composer Terry Riley, whose similar tape-delay feedback system with a pair of Revox tape recorders (a setup Riley used to call the "Time Lag Accumulator") was first used on Riley's album Music for The Gift (1963).

In 1975, Fripp and Eno released a second album, Evening Star, and played several live shows in Europe.

In 2004 Fripp and Eno recorded another ambient music collaboration album, The Equatorial Stars.