pigtronix Infinity looper User Manual page 24

currently armed loop. When ALL is chosen,
holding down the STOP switch will erase the audio
from both loops.
Overdub:
Overdub lets you add additional material to the
original loop.
When a loop is playing back, pressing the
corresponding loop footswitch will begin
overdubbing. The corresponding LED will glow
orange to indicate overdub. Pressing the loop
footswitch again will close the current overdub.
Pressing the same loop footswitch again, once an
overdub has been closed, begins a new overdub
and merges the previous overdub with the initial
recording at the end of the current loop cycle.
Pressing STOP in the middle of an overdub will
cancel that overdub and eliminate the dubbed
audio.
Overdub Undo:
To undo an overdub, a "momentary" remote
switch is required. This should be connected to
the UNDO jack using a standard ¼" instrument
cable.