RJM Mastermind GT/10, User Manual, Page: 21 / 73

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5. Press the Set Default Pedals button. This sets up the expression pedals to control the Axe-Fx.
6. Optional: Use the Get Preset Names feature to read the preset names from the Axe-Fx. This process is
described in the previous section.
7. Exit setup mode.
Usage
Once it’s set up, you’ll see a standard configuration of preset buttons, bank buttons, and IA buttons. The preset buttons
(in green) allow you to select presets on the Axe-Fx, and the bank buttons (in purple) allow you to move through the
banks of presets. If your preset buttons are currently showing presets 0 through 4, pressing Bank Up will change the
presets to display presets 5 through 9. Pressing Bank Up again will shift up to the next bank of presets, and pressing
Bank Down will shift down one bank. The combination of bank and preset buttons allows you to access every preset on
the Axe-Fx.
The blue buttons are IA (Instant Access) buttons. These control individual effect blocks in the current preset. If an IA
button is not lit, that means that the effect block is not available in the current preset. If the IA button is blue, the effect
is available in the current preset but is not currently turned on. If the IA button is aqua or light blue, then the effect is
currently turned on. Any of the IA buttons that are lit can be pressed to turn the associated effect on or off, just like an
effect pedal.
Tuner
The Tuner button turns on the Axe-Fx’s built-in tuner and displays the tuner status on the Mastermind GT’s main
display. The tuner will remain on until the Tuner button is turned off or you select a different preset.
Tempo
The Tempo button allows you to tap out a tempo for time-based effects on the Axe-Fx. The settings in the current Axe-
Fx preset determine which effects follow this tempo. Once it’s been tapped, the Tempo button will flash at the current
tempo.
Troubleshooting
If the Mastermind GT and Axe-Fx don’t appear to be communicating, there are a number of things you should check:
1. Check the MIDI cables and how they’re connected. This is the most common cause of problems. Make sure
your cables are good – try other cables if you have them. Make sure that your 5-pin cables are the “5 pin active”
type.
2. Make sure that the Axe-Fx’s MIDI channel is set to the same MIDI channel as the Axe-Fx entry in the
Mastermind GT’s device settings. By default, these are both set to channel 1, but either could have been
changed to something else.
3. In the Axe-Fx’s I/O / MIDI settings page, make sure that “Send Realtime Sysex” is set to ALL.
Slave Mode
By default, the on/off state of each effect block is determined by the settings stored in the Axe-Fx’s presets. When you
select a preset on the Mastermind GT, the GT selects the desired preset on the Axe-Fx. The Axe-Fx then reports back to
the Mastermind GT, telling it if each effect block is on, off or disabled. The IA buttons are updated to show this status.
In this “normal” mode, if you want to change which effect blocks are turned on or off in a particular preset, you need to
do the editing on the Axe-Fx itself. You can’t update this information on the Mastermind GT.
An alternate method is available, which we refer to “slave mode”. This changes the way the Mastermind GT handles the
IA buttons that control effect blocks. When a preset is selected on the GT, the GT will request a preset on the Axe-Fx,
then report the status of each effect block (“chorus 1 is on”, “drive 1 is off”, etc.). This all happens in a fraction of a
second, and the result is that the GT’s settings override those on the Axe-Fx.