Using M-VAVE Chocolate MIDI controller for Line 6 HX One After some testing I have set up my Chocolate like this: Use the Advanced custom mode Mode: Press Down - release (This will switch on when pressing the button down, not when releasing button on the way up) Foot Switch A (Momentary hold for effect ON, release for effect Off) A Bank 1 CC 4 127 (Effect ON when pressing down) 1 CC 5 0 (Normal view to escape Tuner View if that was on) B Bank 1 CC 4 0 (Effect off when releasing button) Foot Switch B ( Tuner ON, and it stays on until you press one of the other buttons) A Bank 1 CC 5 2 (Tuner ON) (Here you could as an alternative use the Mode: Step short or step long, and use 1 CC 5 0 for long step in Bank B to escape the tuner view, but I like that the buttons respons to click down and not release up) Foot Switch C ( Prev Preset) A Bank 1 CC 72 0 (Previous preset) 1 CC 4 0 (Effect OFF) 1 CC 5 0 (Normal view to escape Tuner View if that was on) Foot Switch D ( Next Preset) A Bank...

The mod is quite simple, but a little fiddly as there is a SM resistor to move. You need to rotate R42, then join the open end of the resistor to the return socket via a wire. The FX level pot will now act as an overall vol pot. Before: After:

How to modify or create a DIY-dual switch with LED and 9 V input, to select Drive ON/OFF and Reverb ON/OFF, making the LED be On when the effect (Drive/Reverb) is On, and not the other way around? This is something I modified for the remote for my Laney LC-30 ii Guitar Tube Amplifier, but can also apply to other amplifiers that have the same behaviour when using a remote control with two switches and two LEDs, where one of the buttons is working inverted. Normaly the Reverb is On when the switch is off, and the Drive is On when the switch is On. When the switch gets it's power from the amp, LED will lit when the switch is Off, making the Drive LED be inverse (ON=Off).  So, a small change in the circuit, will make it more logical, Light ON = Effect ON!