MOTU FastLane Quick Start Manual page 20

THE MIDI THRU BUTTON
The MIDI THRU button on the front of the
FastLane-USB, when pushed in, creates a direct
connection from each MIDI IN connector to its
corresponding MIDI OUT connector. For
example, data received on MIDI IN A is routed
directly to MIDI OUT A. Similarly, data received
on MIDI IN B is routed directly to MIDI OUT B.
This provides a direct connection from the MIDI
device connected to the input to a different device
connected to the output. For example, you could
use your MIDI controller connected to MIDI IN A
to play a MIDI sound module connected to MIDI
OUT A, without the need to run any MIDI
software on the computer.
MIDI THRU button
When MIDI THRU is engaged, MIDI
communication to and from the computer is
temporarily disabled. The USB cable connection
to the computer is still required, however, as it
supplies power to the FastLane-USB. Therefore,
MIDI THRU mode still requires the USB cable to
be connected to the computer, and the computer
must be turned on.
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I N S T A L L I N G T H E M O T U U S B S O F T W A R E