While these videos still apply, we'll be taking new photos and recording new videos for V3! Still 100% capable of everything V2 did, but with more programmability via our new firmware!
Welcome to the Helauxy Duo Midi Version 2!
We've been able to move into a full-metal enclosure, as well as expose a USB port for customer-friendly firmware upgrades.
Equipped with a standard pedalboard 9vdc center-negative power jack, 3.5mm TRS TypeA (MIDI Standard) jack, 2 footswitches, 2 Neopixel LEDS, and preprogrammed with multiple modes, the Helauxy Duo MIDI is ready to expand your HXStomp control.
One of the most commonly asked questions around our regular Helauxy Duo lineup has been “How can I use FS4/FS5, but ALSO use an Expression pedal?”. For a while, the answer was “Any random external MIDI control”. Well now, we're that random external MIDI control! The HDM is preprogrammed with multiple modes to choose from, along with a double-press (both switches at the same time) behavior.
Checkout the Helauxy Duo MIDI config doc linked below to see what all you can configure it to do. The main thing to know is, this is meant to be a simple MIDI controller: You chose your mode, and that's what it does. No mode switches by accident, no worrying what it's setup to do. Boot it, configure it, and that's what it does every time, period.
“But what if I want to change modes mid-set?” – Follow our instagram! While we won't likely be releasing something in this small of a format, we'll continue to innovate and hopefully have something for you in the future.

This is such a great midi switch. It really opens up a lot possibilities for controlling my HX Stomp without taking up any additional real estate on my pedalboard. It also frees up the HX Stomp expression jack so that I can use an expression pedal. Just plain awesome!
I thought I needed a dual switch for my stomp but wanted to still use the expression jack for a volume pedal then stumbled upon that wonder ! There’s more than meets the eye too with it’s différents modes and the fact you can click both switches to do something different too, it’s just brilliant!
Jason spent a good amount of time helping me figure out the right way for me to use it and also helped a bunch by custom tailoring the firmware of my device.
Absolutely recommend !