User Manual
 DIGITAL MUSIC CORPORATION 12 
Using the GCX with a Ground Control 
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Your GCX is part of the Ground Control System, and is easiest to control with the 
Ground Control Programmable MIDI Foot Controller. From the Ground Control, you 
can specify whether each loop should act as an audio loop, latched switch, or momentary 
switch. You can then control loops individually, as well as save loop settings with each 
of your 100 presets for instant recall. 
If your Ground Control has the optional expanded memory, you can control up to four 
GCX Guitar Audio Switchers to provide 32 audio loops and switches. 
Connection 
Connect a standard 5-pin MIDI cable from the 
MIDI OUT of the Ground Control to the 
PEDAL IN of the GCX. Because the Ground Control will both send MIDI data to and 
receive power from the GCX, you must use a MIDI cable with all five pins wired (most 
are). Also, since the Ground Control's power is now supplied by the GCX, you no longer 
need to use the power adapter which comes with the Ground Control. 
If you have more than one GCX, connect the 
MIDI OUT of your first GCX to the PEDAL IN 
of the second GCX. Continue chaining additional GCXs in this manner. 
Now connect from the 
MIDI OUT of the GCX to the MIDI In of your first device. If you 
have additional devices, connect the MIDI Thru of your first device to the MIDI In of 
your next device. Continue to chain your devices, MIDI Thru to MIDI In until all your 
devices are connected. If you are chaining more than 3 additional MIDI devices, using a 
MIDI Thru box like the Digital Music MX-28S will eliminate data problems caused by 
generation loss. 
Setup Mode 
In Setup Mode, you will first tell the Ground Control that it is connected to a GCX, and 
then specify how each GCX loop should function. Here's how: 










