35
External Switches
The Mastermind GT supports up to four external switches. These can be used to add switches to remote locations, to
add different types of switches for specialized functions like tap tempo, or simply to increase the number of available
switches.
There are two external switch jacks on the rear of the Mastermind GT labeled “Switch 1/2” and “Switch 3/4". Each jack
can take a single switch or a double switch with a TRS (tip-ring-sleeve) plug. A single switch should use a TRS plug with
the switch connected to the tip and ground, and the ring conductor unconnected to anything. If an LED is wired in
parallel with the switch with the cathode connected to the shield of the TRS connector, the Mastermind GT will light the
LED when the switch is on.
(Note: if you’re building your own external switch, please note that the switch must be momentary and normally open, and
the LED should be a type with a low forward voltage. Typically, this means red, yellow or green LEDs. Blue or white LEDs will
not work.)
RJM Music sells single and dual external switches made to work correctly with the Mastermind GT, and Mission
Engineering’s SP1-RJM expression pedal includes a toe switch (similar to the on/off switch on a wah pedal) with an LED
that can work as an external switch for the Mastermind GT.
External switches have global settings which can be edited in the main Setup Menu. You can also override the global
settings in any preset by selecting the External Switches option and turning on the Override parameter. External
switches are edited just like any other button, as described in the Editing Buttons section.
To Next Page
Loading...
Need help?
General
