As control rooms become increasingly agile, potential features increase, as do new technical considerations. In the days of analog video and audio, transmission of a wired signal was as fast as electromagnetic waves on a copper wire. There are variables involved, but in many cases, that equates to more than half the speed of light. In nearly all cases, the transmission is perceptibly instantaneous. Processing in the analog domain is essentially just as fast, only serving to slightly lengthen the signal path.