Quadruple I/O

MIDI

Utility

Four-button MIDI controller with MIDI I/O, designed for Line 6 HX Stomp.

The Quadruple I/O is a custom handmade four-button MIDI controller with MIDI input and output sockets, preprogrammed for plug-and-play use with the Line 6 HX Stomp. Features backlit buttons with fixed color LED rings and RGB LEDs that indicate the controller mode.

Firmware supports preset, snapshot, footswitch, CC, and looper modes. LED ring brightness or blink patterns indicate the selected snapshot. Currently optimized for HX Stomp with user-programmable firmware in development.