pigtronix Infinity looper User Manual page 15

EXP - This is the TRS expression pedal input for
controlling the audio output level of both
loops simultaneously. Moving the expression
pedal towards the heel will turn the loop
audio down from the level set by the
individual loop volume knobs. Use a Pigtronix
(or equivalent) expression pedal with a TRS
cable for best results.
MIDI IN - This provides a connection for MIDI
beat clock sync (slave). Infinity Looper will
sync to MIDI whenever a MIDI BEAT CLOCK
signal is preset. The Infinity Looper can also be
configured to obey MIDI START, STOP and
Song Select commands. To enable this
behavior, hold down the SYNC switch when
powering up.
USB – This provides a connection to a PC or
MAC computer for loading and offloading
loop audio as well as preset management
and firmware updates. The Infinity Looper is
"plug and play" device.
When the USB port is connected, the Infinity
boots into USB mode and will not function as a
looper until the USB is disconnected and
rebooted. Save any loop data you wish to
keep before plugging the Infinity in via USB.