General
In certain cases, a Mastermind GT will get into a state that makes it impossible to factory reset it or load new settings from the computer. This is a proc...
Sat, 6 Nov, 2021 at 1:36 PM
To install a firmware update on the Mastermind GT, you need a USB flash drive and an update file. NOTE!!! Please remember to back up your settings befor...
Wed, 11 Nov, 2020 at 9:19 PM
If you find that your expression pedal is acting strangely, with all of the value change bunched up on one end of the pedal, it's likely a polarity issu...
Sun, 30 Aug, 2020 at 8:13 PM
We've had good luck with this case by SKB, part number 3i-2217-8B-C https://www.sweetwater.com/store/detail/3i22178BC--skb-3i-2217-8b-c-22-inch-by-1...
Wed, 20 Jun, 2018 at 11:15 AM
The Mastermind GT/22 has secondary MIDI ports that use 6-pin XLR connectors. These function exactly the same as the 7-pin MIDI ports, but use a more durable...
Wed, 18 Aug, 2021 at 9:08 AM
The Effect Gizmo and Rack Gizmo are able to phantom power a Mastermind GT as long as you follow a few rules: 1). Use the Mastermind GT's power suppl...
Thu, 30 Nov, 2023 at 9:23 AM
The Mastermind GT has four rubber feet that are screwed into the case. You can easily remove these if you want to mount the GT to a pedalboard. Once the fee...
Mon, 18 Mar, 2019 at 4:17 PM
Depending on your GT's age, it may come with one of two types of switches. If the GT is set up for the wrong type of switch, you can see odd things happ...
Fri, 29 Mar, 2019 at 2:05 PM