A signal routed to an echo send line from a point before the input fader. The position on the echo send switch which accomplishes this. A before-the-signal tape echo, caused by print-through.
"We are impressed with the quality of the CD. Two completely broken records, and only faint echoes of the breaks can be heard. That you were able to transfer anything from those two records is remarkable. The other old records (one from Germany circa 1930 and an Al Jolson from about the same period) sound like the artists are in the room with ..."