What it seems to boil down to is this: being left out of the loop is perceived as a signal that one has low status or standing in the group.

FORBES: The Hidden Dangers of Leaving Someone Out of the Loop

It is also a force in digital loop carriers, which convert multiple voice calls into a single digital signal and can use either copper or fiber-optic cables.

FORBES: Laggard

The unique Loop Recorder also allows DJs to capture and overdub audio loops from the live mix, cue signal or an external input on the fly, and drop them back into the mix at any time.

ENGADGET: Traktor Kontrol S4 hardware interface set to make the scene this winter

Researchers also found that rewarding the encoder alongside the decoder created a virtuous loop, as treating the first rat for a job well done focused its attention and improved the signal strength.

ENGADGET