"Time Lag Accumulator' was a system developed by Terry Riley in the 60's & also used in recordings made by Pauline Oliveros, Brian Eno & Robert Fripp. It was an 'open ended' technique using two revox reel to reel recorders with the tape spooled between them, the length of time lag is determined by the distance between the two tape machines. Recorded tape was spooled off on the second machine and used in recordings such as 'Poppy Nogood and the Phantom Band' - Riley, 'I of IV'